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Circulation. 1999;100:376-380

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(Circulation. 1999;100:376-380.)
© 1999 American Heart Association, Inc.


Clinical Investigation and Reports

Trandolapril Reduces the Incidence of Atrial Fibrillation After Acute Myocardial Infarction in Patients With Left Ventricular Dysfunction

Ole Dyg Pedersen, MD; Henning Bagger, MD; Lars Køber, MD; Christian Torp-Pedersen, MD; on behalf of the TRACE Study Group

From the Department of Cardiology P, Gentofte University Hospital (O.D.P., L.K., C.T.-P.), and the Department of Medicine, Viborg Sygehus (H.B.), Denmark.

Correspondence to Ole Dyg Pedersen, MD, Department of Cardiology P, Gentofte University Hospital, Niels Andersensvej 65, 2900 Hellerup, Denmark. E-mail odplc{at}dadlnet.dk


*    Abstract
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Background—Studies have suggested that ACE inhibitors have an antiarrhythmic effect on ventricular arrhythmias. Whether they have an effect on atrial fibrillation is unknown.

Methods and Results—We investigated the effect of ACE inhibition with trandolapril on the incidence of atrial fibrillation in patients with reduced left ventricular function secondary to acute myocardial infarction. The patients in this study were those who qualified for inclusion into the TRAndolapril Cardiac Evaluation (TRACE) study, a randomized double-blind placebo-controlled study and who had sinus rhythm on the ECG obtained at randomization. Patients who fulfilled the criteria for inclusion were randomized to treatment with the ACE inhibitor trandolapril or placebo and were followed up for 2 to 4 years. Development and time to occurrence of atrial fibrillation in one 12-lead ECG recorded at the outpatient visits was the primary end point of this investigation. Of the 1749 patients included in the TRACE study, 1577 had sinus rhythm on the ECG recorded at randomization. Of these patients, 790 were randomized to trandolapril treatment and 787 to placebo treatment. The groups differed only slightly with respect to baseline characteristics. A total of 64 patients developed atrial fibrillation during the 2- to 4-year follow-up period. Significantly more patients developed atrial fibrillation in the placebo group than in the trandolapril group, 5.3% (n=42) versus 2.8% (n=22), respectively, P<0.05. Cox multivariable regression analysis, adjusting for important baseline characteristics, revealed that trandolapril treatment significantly reduced the risk of developing atrial fibrillation (RR, 0.45; 95% CI, 0.26 to 0.76; P<0.01).

Conclusions—The results from the present study demonstrate that trandolapril treatment reduces the incidence of atrial fibrillation in patients with left ventricular dysfunction after acute myocardial infarction.


Key Words: angiotensin • enzymes • fibrillation • myocardial infarction


*    Introduction
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Angiotensin-converting enzyme inhibitor drugs are not antiarrhythmic in the conventional sense, but it has been suggested that they reduce the occurrence of arrhythmias in patients with ischemic heart disease and left ventricular dysfunction.1 This reduction has been reported primarily as a decrease in the occurrence of ventricular arrhythmias.2 3 4 Although the antiarrhythmic mechanism of ACE inhibitors is not completely understood,1 it is possible that they affect the tendency to develop supraventricular arrhythmias, such as atrial fibrillation. Webster et al5 observed that ACE inhibition was associated with a trend toward reduction of the frequency of atrial premature beats over time in addition to a decrease in atrial pressure. In another study, Van den Berg et al6 observed that pretreatment with an ACE inhibitor before DC cardioversion of atrial fibrillation caused a nonsignificant reduction of the relapse rate. These observations indicate that ACE-inhibitor treatment might reduce the occurrence of atrial fibrillation, an aspect that has not previously been investigated. In the present investigation, we studied whether the ACE inhibitor trandolapril had any effect on the incidence of atrial fibrillation in patients with left ventricular dysfunction after acute myocardial infarction.


*    Methods
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The patients in the present study are those who were included in the TRAndolapril Cardiac Evaluation (TRACE) study,7 a randomized double-blind placebo-controlled study, and who had sinus rhythm at the 12-lead ECG obtained at randomization. The design of the TRACE study has previously been described in detail.8 Briefly, consecutive patients >18 years old admitted to 27 centers in Denmark in the period May 1990 to June 1992 with acute myocardial infarction were screened for inclusion into the study. Patients who fulfilled the criteria for inclusion and who had impaired left ventricular function determined by echocardiography (wall motion index [WMI] <=1.2, corresponding to a left ventricular ejection fraction [LVEF] <=36%) were randomized to trandolapril treatment or placebo between days 3 and 7 after the onset of symptoms of myocardial infarction. The study drug was initially given as 1 mg/d and, if possible, was increased to 2 mg/d before discharge from hospital. Approximately 4 weeks after the myocardial infarction, the dose was increased to 4 mg/d if possible. Patients who did not tolerate the dose increase were kept on a lower dose, a minimum of 1 mg/d. The patients were followed up for 2 to 4 years after inclusion. They were seen 1 month after inclusion, after an additional 2 months, and thereafter every 3 months until the study was completed. At each of these outpatient visits, a clinical examination including blood sampling was performed and a 12-lead ECG was recorded. The blood samples were collected according to a standardized method in the morning after an overnight fast and {approx}24 hours after the last dose of the trial medication. All measurements were performed in 1 central laboratory. The evaluation of the ECGs by the investigators was entered into the patient's case report form. Atrial fibrillation was defined as absence of P waves, coarse or fine fibrillatory waves, and completely irregular RR intervals. In addition, at the visits at 3 months, 6 months, and 12 months after randomization, a new echocardiographic examination was performed to determine left ventricular function. The echocardiographic method used for the screening and follow-up procedure has been described in detail.9 10 In a 9-segment model of the left ventricle, WMI was calculated by use of a reverse scoring system, as described by Berning et al.10 With this method, WMI multiplied by 0.3 gives a precise estimation of LVEF. In this article, we primarily report the estimated LVEF. For comparison, WMI=2.0 corresponds to LVEF=60%, WMI=1.2 corresponds to LVEF=35%, and WMI=0.6 corresponds to LVEF=18%. The ethics committee of the participating departments approved the study. Informed consent was obtained before patients were included in the study.

Statistical Methods
Differences in baseline characteristics between the groups were examined by use of {chi}2 and Mann-Whitney tests for categorical and continuous variables, respectively. Categorical data are presented as percentages, and continuous variables are presented as median values. Development and time to occurrence of atrial fibrillation in one 12-lead ECG during the follow-up was the primary end point of the study. The cumulative incidences of atrial fibrillation in the trandolapril-treated group and the placebo group were estimated by the Kaplan-Meier method and are presented in a Kaplan-Meier plot. The log-rank test was used to assess differences between the groups. Cox proportional-hazards regression analysis was used to examine the risk reduction between the groups, with adjustment for important baseline characteristics. A stepwise backward procedure was used, excluding variables above a value of P=0.05. A value of P<0.05 was considered statistically significant. All statistical analyses were performed by use of the SAS statistical package (SAS Institute).


*    Results
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Study Population
Of 1749 patients randomized to the TRACE study, 1577 had sinus rhythm at the time of randomization. These are the patients investigated in the present study. Of the 1577 patients with sinus rhythm, 790 were randomized to trandolapril treatment and 787 to placebo treatment.

Development of Atrial Fibrillation
A total of 64 patients developed atrial fibrillation during the follow-up period. In the placebo group, 5.3% (n=42) developed atrial fibrillation, whereas in the trandolapril group, 2.8% (n=22) developed atrial fibrillation, P<0.05 (Figure 1Down). Cox multivariable regression analysis revealed that trandolapril treatment significantly reduced the risk of developing atrial fibrillation (RR, 0.45; 95% CI, 0.26 to 0.76; P<0.01), with adjustment for a number of baseline characteristics.



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Figure 1. Kaplan-Meier plot of incidence of atrial fibrillation during a 2- to 4-year follow-up period in 1577 post–myocardial infarction patients with reduced left ventricular function and sinus rhythm at baseline randomized to trandolapril treatment or placebo.

Eighteen baseline variables were originally included in the Cox model. After the stepwise backward Cox regression procedure was performed, 6 variables remained in the model. The following factors were significantly related to development of atrial fibrillation: severe congestive heart failure at baseline, left ventricular function, male sex, use of digitalis at baseline, age, and systolic blood pressure.

Baseline Characteristics
The distribution of the baseline characteristics between treatment groups is shown in Table 1Down. There were differences between the trandolapril group and the placebo group. The patients in the trandolapril group had a slightly higher diastolic blood pressure at baseline than the placebo group. Slightly more patients received nitrates, and there was a trend toward a higher prevalence of history of angina at baseline in the trandolapril group and this group was less often treated with diuretics. The differences were small, and none of the other baseline characteristics differed between the groups. Except for digoxin, very few patients—6 total—received antiarrhythmic treatment at baseline.


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Table 1. Baseline Characteristics of 1577 Post–Myocardial Infarction Patients With Sinus Rhythm Randomized to Trandolapril Treatment or Placebo Treatment

Important Variables During the Follow-Up Period
The serum potassium concentration was almost unchanged during follow-up and was not significantly different between the groups with and without atrial fibrillation during follow-up. In the placebo group, the serum potassium concentrations in the groups that developed/did not develop atrial fibrillation were (median values, 5th and 95th percentiles) at baseline, 4.1 (3.5 to 5.1) mmol/L versus 4.1 (3.4 to 4.8) mmol/L; at day 5, 4.4 (3.6 to 4.6) mmol/L versus 4.4 (3.7 to 5.0) mmol/L; at day 30, 4.2 (3.9 to 4.7) mmol/L versus 4.2 (3.7 to 4.9) mmol/L; and at last visit, 4.6 (3.9 to 4.9) mmol/L versus 4.4 (3.6 to 5.1) mmol/L. In the trandolapril group, the serum potassium concentrations in the groups that developed/did not develop atrial fibrillation were at baseline, 4.1 (3.2 to 5.2) mmol/L versus 4.1 (3.4 to 4.8) mmol/L; at day 5, 4.3 (3.6 to 5.3) mmol/L versus 4.3 (3.6 to 4.8) mmol/L; at day 30, 4.1 (3.6 to 5.2) mmol/L versus 4.2 (3.5 to 4.8) mmol/L; and at last visit, 4.3 (3.6 to 5.1) mmol/L versus 4.2 (3.5 to 4.9) mmol/L.

As in the main study, LVEF increased during the first year of follow-up. There was a nonsignificant trend toward a lower LVEF in the groups that developed atrial fibrillation, but when the moderate changes of LVEF obtained at 3, 6, and 12 months were included in a multivariate Cox model as a time-dependent variable, the importance of the ACE inhibitor for prevention of atrial fibrillation was not changed. In contrast, development of heart failure as a time-dependent variable in the Cox model was associated with a trend toward development of atrial fibrillation (P=0.08), but the effect of trandolapril remained consistent (P<0.01).

Mortality in Patients Who Developed Atrial Fibrillation
There was a trend toward a higher mortality in patients who developed atrial fibrillation during the follow-up period (RR, 1.2; 95% CI, 0.73 to 2.06; P=NS).


*    Discussion
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up arrowAbstract
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up arrowMethods
up arrowResults
*Discussion
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It has been reported that ACE inhibitors reduce the incidence of ventricular arrhythmias,2 3 4 but the present study is the first to demonstrate that ACE-inhibitor treatment also reduces the incidence of atrial fibrillation. In patients with sinus rhythm and left ventricular dysfunction secondary to myocardial infarction, ACE-inhibitor treatment with trandolapril reduced the risk of developing atrial fibrillation by 55% during a 2- to 4-year follow-up period.

Incidence of Atrial Fibrillation
The incidence of atrial fibrillation in our study was lower than reported in some recent post–myocardial infarction studies.11 12 13 14 However, the incidences observed in those studies cannot be compared with the incidence in our study. Those studies reported the incidence during the entire hospitalization, whereas our study reports the incidence from the time of randomization, which was from day 2 to day 6 (mean, 4.5 days) after the myocardial infarction and during a 2- to 4-year follow-up period.7 Importantly, patients without sinus rhythm at the time of randomization (10%) were excluded from our study. In fact, the incidence in our study was higher than the incidence in the general population recently reported from the Framingham study.15

Characteristics
The randomized groups differed slightly with respect to a few baseline characteristics (Table 1Up), but it is unlikely that these differences account for the difference observed with respect to development of atrial fibrillation. Importantly, adjustment for these variables in the multivariable regression analysis did not affect the result.

Mechanisms
Several possible mechanisms exist by which ACE inhibitors may have antiarrhythmic activity. These include decrease of wall stress, modulation of refractoriness, interference with ion currents, ß-blocking properties, modification of sympathetic tone, and stabilization of electrolyte concentrations.16 17 18 19 20 21

Serum Potassium
It is believed that ACE inhibition stabilizes the serum potassium concentration and that this may prevent the development of arrhythmias.20 The serum potassium concentration remained virtually unchanged during the follow-up in the groups that developed atrial fibrillation and not different from the groups that did not develop atrial fibrillation. Thus, it is unlikely that the difference in development of atrial fibrillation was caused by changes in the extracellular potassium concentration.

Ventricular Function and Heart Failure
The difference in incidence of atrial fibrillation cannot be explained by differences in left ventricular systolic function (Table 2Down). Deterioration of left ventricular function and development of clinical heart failure are expected to precipitate development of atrial fibrillation. Although the observed difference in development of atrial fibrillation could not be explained by differences in left ventricular function, it may be related to the increased development of heart failure observed in the placebo group. In our analysis, there was a trend toward an association with development of severe heart failure, but the effect of ACE inhibition remained consistent.


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Table 2. LVEF in 1577 Post–Myocardial Infarction Patients Within the First 12 Months After Randomization to Trandolapril Treatment or Placebo Treatment

Atrial Stretch
We have no data to explain the underlying mechanism of the finding in our study. However, increasing evidence suggests that atrial stretch induced by increased atrial pressure may precipitate atrial fibrillation through an effect on atrial refractoriness.21 22 Interestingly, it is known that ACE inhibitors decrease atrial pressure,5 and in patients with chronic mitral regurgitation, ACE inhibitors reduce regurgitation.23 Therefore, it is possible that ACE-inhibitor treatment minimizes the susceptibility to develop atrial fibrillation by lowering atrial pressure and reducing left atrial enlargement. Whether this is the mechanism of the present finding remains to be demonstrated.

Mortality
It has recently been reported that development of atrial fibrillation in the general population is associated with increased mortality.15 Accordingly, we found a trend toward an increased mortality in those patients who developed atrial fibrillation after acute myocardial infarction. We had much shorter follow-up than Benjamin et al15 and fewer patients who developed atrial fibrillation. A longer follow-up period might have resulted in a significant result. Whether prevention of development of atrial fibrillation also reduces mortality remains unanswered.

In the main TRACE study, trandolapril, in addition to reducing all-cause mortality, also reduced sudden cardiac death, and in the present study, the incidence of atrial fibrillation is reduced. ACE inhibitors attenuate left ventricular enlargement after acute myocardial infarction.24 Therefore, it might be possible that these findings are all a result of an optimal treatment of the underlying heart disease.

Limitations
There are limitations of this study. The present analysis was not a prespecified end point in the TRACE study. However, the 12-lead ECGs, which are the basis of the analysis, were prospectively recorded and evaluated. Therefore, only the statistical analysis was done retrospectively.

The end point of this study was the time to the first occurrence of atrial fibrillation on one 12-lead ECG recorded at the routine follow-up visits in the 2- to 4-year follow-up period. This may not reflect the true burden of atrial fibrillation, and it remains unanswered whether Holter monitoring every 3 months would have captured more cases of atrial fibrillation. It is also important to mention that we did not record episodes that occurred outside the planned routine visits. These limitations may have influenced the registration of atrial fibrillation, but this was similar for the 2 groups. It also means that we did not differentiate between development of paroxysmal and persistent/permanent atrial fibrillation.


*    Acknowledgments
 
The TRACE study was supported by a grant from Roussel Uclaf, Romainville, France, and Knoll, Ludwigshafen, Germany.

Received December 31, 1998; revision received April 12, 1999; accepted April 28, 1999.


*    References
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*References
 
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24. St John Sutton M, Pfeffer MA, Plappert T, Rouleau JL, Moye LA, Dagenais GR, Lamas GA, Klein M, Sussex B, Goldman S, Menapace FJ, Parker JO, Lewis S, Sestier F, Gordon DF, McEwan P, Bernstein V, Braunwald E, for the SAVE investigators. Quantitative two-dimensional echocardiographic measurements are major predictors of adverse cardiovascular events after acute myocardial infarction: the protective effects of captopril. Circulation. 1994;89:68–75.It has been suggested that ACE inhibitors reduce the occurrence of ventricular arrhythmias in patients with ischemic heart disease and left ventricular dysfunction. The present report studied the effect of ACE inhibition on the incidence of atrial fibrillation in patients with left ventricular dysfunction secondary to acute myocardial infarction. Patients with sinus rhythm (n=1577) were randomized to trandolapril treatment or placebo treatment. The study demonstrates that ACE inhibition with trandolapril reduces the incidence of atrial fibrillation by 55% in a 2- to 4-year follow-up period.[Abstract/Free Full Text]




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J Am Coll CardiolHome page
G. Casaclang-Verzosa, B. J. Gersh, and T. S.M. Tsang
Structural and functional remodeling of the left atrium: clinical and therapeutic implications for atrial fibrillation.
J. Am. Coll. Cardiol., January 1, 2008; 51(1): 1 - 11.
[Abstract] [Full Text] [PDF]


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EuropaceHome page
F. G. Cosio, E. Aliot, G. L. Botto, H. Heidbuchel, C. J. Geller, P. Kirchhof, J.-C. De Haro, R. Frank, J. P. Villacastin, J. Vijgen, et al.
Delayed rhythm control of atrial fibrillation may be a cause of failure to prevent recurrences: reasons for change to active antiarrhythmic treatment at the time of the first detected episode
Europace, January 1, 2008; 10(1): 21 - 27.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
T. T. Issac, H. Dokainish, and N. M. Lakkis
Role of Inflammation in Initiation and Perpetuation of Atrial Fibrillation: A Systematic Review of the Published Data
J. Am. Coll. Cardiol., November 20, 2007; 50(21): 2021 - 2028.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
H.-R. Neuberger, C. Mewis, D. J. van Veldhuisen, U. Schotten, I. C. van Gelder, M. A. Allessie, and M. Bohm
Management of atrial fibrillation in patients with heart failure
Eur. Heart J., November 1, 2007; 28(21): 2568 - 2577.
[Abstract] [Full Text] [PDF]


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CirculationHome page
M. D. O'Neill, P. Jais, M. Hocini, F. Sacher, G. J. Klein, J. Clementy, and M. Haissaguerre
Catheter Ablation for Atrial Fibrillation
Circulation, September 25, 2007; 116(13): 1515 - 1523.
[Full Text] [PDF]


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CirculationHome page
M. Pretorius, B. S. Donahue, C. Yu, J. P. Greelish, D. M. Roden, and N. J. Brown
Plasminogen Activator Inhibitor-1 as a Predictor of Postoperative Atrial Fibrillation After Cardiopulmonary Bypass
Circulation, September 11, 2007; 116(11_suppl): I-1 - I-7.
[Abstract] [Full Text] [PDF]


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Eur Heart J SupplHome page
B. N. Singh and E. Aliot
Newer antiarrhythmic agents for maintaining sinus rhythm in atrial fibrillation: simplicity or complexity?
Eur. Heart J. Suppl., September 1, 2007; 9(suppl_G): G17 - G25.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
A. Shiroshita-Takeshita, B. J.J.M. Brundel, B. Burstein, T.-K. Leung, H. Mitamura, S. Ogawa, and S. Nattel
Effects of simvastatin on the development of the atrial fibrillation substrate in dogs with congestive heart failure
Cardiovasc Res, April 1, 2007; 74(1): 75 - 84.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
B. Williams
The Year in Hypertension
J. Am. Coll. Cardiol., October 17, 2006; 48(8): 1698 - 1711.
[Full Text] [PDF]


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Eur J Heart FailHome page
L. Kober, K. Swedberg, J. J.V. McMurray, M. A. Pfeffer, E. J. Velazquez, R. Diaz, A. P. Maggioni, V. Mareev, G. Opolski, F. Van de Werf, et al.
Previously known and newly diagnosed atrial fibrillation: A major risk indicator after a myocardial infarction complicated by heart failure or left ventricular dysfunction
Eur J Heart Fail, October 1, 2006; 8(6): 591 - 598.
[Abstract] [Full Text] [PDF]


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EuropaceHome page
Writing Committee Members, V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, et al.
ACC/AHA/ESC 2006 guidelines for the management of patients with atrial fibrillation: full text: A report of the American College of Cardiology/American Heart Association Task Force on practice guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation) Developed in collaboration with the European Heart Rhythm Association and the Heart Rhythm Society
Europace, September 1, 2006; 8(9): 651 - 745.
[Full Text] [PDF]


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J Am Coll CardiolHome page
V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al.
ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation--Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society
J. Am. Coll. Cardiol., August 15, 2006; 48(4): 854 - 906.
[Full Text] [PDF]


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J Am Coll CardiolHome page
V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al.
ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society
J. Am. Coll. Cardiol., August 15, 2006; 48(4): e149 - e246.
[Full Text] [PDF]


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CirculationHome page
V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al.
ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation): Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society
Circulation, August 15, 2006; 114(7): e257 - e354.
[Full Text] [PDF]


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CirculationHome page
V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, J. E. Lowe, et al.
ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation--Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients With Atrial Fibrillation): Developed in Collaboration With the European Heart Rhythm Association and the Heart Rhythm Society
Circulation, August 15, 2006; 114(7): 700 - 752.
[Full Text] [PDF]


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Eur Heart JHome page
Authors/Task Force Members, V. Fuster, L. E. Ryden, D. S. Cannom, H. J. Crijns, A. B. Curtis, K. A. Ellenbogen, J. L. Halperin, J.-Y. Le Heuzey, G. N. Kay, et al.
ACC/AHA/ESC 2006 guidelines for the management of patients with atrial fibrillation executive summary: A report of the American College of Cardiology/American Heart Association Task Force on practice guidelines and the European Society of Cardiology Committee for Practice Guidelines (Writing Committee to Revise the 2001 Guidelines for the Management of Patients with Atrial Fibrillation) Developed in collaboration with the European Heart Rhythm Association and the Heart Rhythm Society
Eur. Heart J., August 2, 2006; 27(16): 1979 - 2030.
[Full Text] [PDF]


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Eur Heart JHome page
Y. Yin, D. Dalal, Z. Liu, J. Wu, D. Liu, X. Lan, Y. Dai, L. Su, Z. Ling, Q. She, et al.
Prospective randomized study comparing amiodarone vs. amiodarone plus losartan vs. amiodarone plus perindopril for the prevention of atrial fibrillation recurrence in patients with lone paroxysmal atrial fibrillation
Eur. Heart J., August 1, 2006; 27(15): 1841 - 1846.
[Abstract] [Full Text] [PDF]


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Eur J Heart FailHome page
D. J. van Veldhuisen, H. Aass, D. El Allaf, P. H.J.M. Dunselman, L. Gullestad, M. Halinen, J. Kjekshus, L. Ohlsson, H. Wedel, J. Wikstrand, et al.
Presence and development of atrial fibrillation in chronic heart failure: Experiences from the MERIT-HF Study
Eur J Heart Fail, August 1, 2006; 8(5): 539 - 546.
[Abstract] [Full Text] [PDF]


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Journal of Renin-Angiotensin-Aldosterone SystemHome page
P. A Meredith and J. Ostergren
Review: From Hypertension to Heart Failure -- Are There Better Primary Prevention Strategies?
Journal of Renin-Angiotensin-Aldosterone System, June 1, 2006; 7(2): 64 - 73.
[Abstract] [PDF]


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Eur Heart JHome page
J. R. Ehrlich, S. H. Hohnloser, and S. Nattel
Role of angiotensin system and effects of its inhibition in atrial fibrillation: clinical and experimental evidence
Eur. Heart J., March 1, 2006; 27(5): 512 - 518.
[Abstract] [Full Text] [PDF]


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J Clin PharmacolHome page
J. S. Kalus, C. I. Coleman, and C. M. White
The Impact of Suppressing the Renin-Angiotensin System on Atrial Fibrillation
J. Clin. Pharmacol., January 1, 2006; 46(1): 21 - 28.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
K. Wachtell, M. Lehto, E. Gerdts, M. H. Olsen, B. Hornestam, B. Dahlof, H. Ibsen, S. Julius, S. E. Kjeldsen, L. H. Lindholm, et al.
Reply
J. Am. Coll. Cardiol., October 18, 2005; 46(8): 1585 - 1586.
[Full Text] [PDF]


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Eur Heart JHome page
M. D.M. Engelmann and J. H. Svendsen
Inflammation in the genesis and perpetuation of atrial fibrillation
Eur. Heart J., October 2, 2005; 26(20): 2083 - 2092.
[Abstract] [Full Text] [PDF]


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J CARDIOVASC PHARMACOL THERHome page
B. N. Singh
{beta}-Adrenergic Blockers as Antiarrhythmic and Antifibrillatory Compounds: An Overview
Journal of Cardiovascular Pharmacology and Therapeutics, October 1, 2005; 10(4_suppl): S3 - S14.
[Abstract] [PDF]


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HeartHome page
O Wazni, D O Martin, N F Marrouche, M Shaaraoui, M K Chung, S Almahameed, R A Schweikert, W I Saliba, and A Natale
C reactive protein concentration and recurrence of atrial fibrillation after electrical cardioversion
Heart, October 1, 2005; 91(10): 1303 - 1305.
[Abstract] [Full Text] [PDF]


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CirculationHome page
S. C. Dudley Jr, N. E. Hoch, L. A. McCann, C. Honeycutt, L. Diamandopoulos, T. Fukai, D. G. Harrison, S. I. Dikalov, and J. Langberg
Atrial Fibrillation Increases Production of Superoxide by the Left Atrium and Left Atrial Appendage: Role of the NADPH and Xanthine Oxidases
Circulation, August 30, 2005; 112(9): 1266 - 1273.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
J. S. Healey, A. Baranchuk, E. Crystal, C. A. Morillo, M. Garfinkle, S. Yusuf, and S. J. Connolly
Prevention of Atrial Fibrillation With Angiotensin-Converting Enzyme Inhibitors and Angiotensin Receptor Blockers: A Meta-Analysis
J. Am. Coll. Cardiol., June 7, 2005; 45(11): 1832 - 1839.
[Abstract] [Full Text] [PDF]


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Eur Heart J SupplHome page
B. J. Gersh, T. S.M. Tsang, M. E. Barnes, and J. B. Seward
The changing epidemiology of non-valvular atrial fibrillation: the role of novel risk factors
Eur. Heart J. Suppl., May 1, 2005; 7(suppl_C): C5 - C11.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
K. Wachtell, M. Lehto, E. Gerdts, M. H. Olsen, B. Hornestam, B. Dahlof, H. Ibsen, S. Julius, S. E. Kjeldsen, L. H. Lindholm, et al.
Angiotensin II receptor blockade reduces new-onset atrial fibrillation and subsequent stroke compared to atenolol: The Losartan Intervention For End point reduction in hypertension (LIFE) study
J. Am. Coll. Cardiol., March 1, 2005; 45(5): 712 - 719.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
M. G. Bourassa
Angiotensin II inhibition and prevention of atrial fibrillation and stroke
J. Am. Coll. Cardiol., March 1, 2005; 45(5): 720 - 721.
[Full Text] [PDF]


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J Am Coll CardiolHome page
J. McMurray, L. Kober, M. Robertson, H. Dargie, W. Colucci, J. Lopez-Sendon, W. Remme, D. N. Sharpe, and I. Ford
Antiarrhythmic effect of carvedilol after acute myocardial infarction: Results of the Carvedilol Post-Infarct Survival Control in Left Ventricular Dysfunction (CAPRICORN) trial
J. Am. Coll. Cardiol., February 15, 2005; 45(4): 525 - 530.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
M. Lehto, S. Snapinn, K. Dickstein, K. Swedberg, M. S. Nieminen, and on behalf of the OPTIMAAL investigators
Prognostic risk of atrial fibrillation in acute myocardial infarction complicated by left ventricular dysfunction: the OPTIMAAL experience
Eur. Heart J., February 2, 2005; 26(4): 350 - 356.
[Abstract] [Full Text] [PDF]


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NEJMHome page
R. L. Page
Newly Diagnosed Atrial Fibrillation
N. Engl. J. Med., December 2, 2004; 351(23): 2408 - 2416.
[Full Text] [PDF]


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CMAJHome page
S. Nattel
Antiarrhythmic drugs for atrial fibrillation: Do we need better use, better drugs or a randomized trial of ablation as primary therapy?
Can. Med. Assoc. J., September 28, 2004; 171(7): 752 - 753.
[Full Text] [PDF]


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CMAJHome page
G. D. Veenhuyzen, C. S. Simpson, and H. Abdollah
Atrial fibrillation
Can. Med. Assoc. J., September 28, 2004; 171(7): 755 - 760.
[Abstract] [Full Text] [PDF]


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Journal of Renin-Angiotensin-Aldosterone SystemHome page
A. H Madrid, I. M. Marin, C. Escobar Cervantes, E. Bernal Morell, J. Escudero Estevez, G. Moreno, J. Rondon Parajon, Jian Peng, L. Limon, S. Nannini, et al.
Prevention of recurrences in patients with lone atrial fibrillation. The dose-dependent effect of angiotensin II receptor blockers
Journal of Renin-Angiotensin-Aldosterone System, September 1, 2004; 5(3): 114 - 120.
[Abstract] [PDF]


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HeartHome page
W Anne, R Willems, N Van der Merwe, F Van de Werf, H Ector, and H Heidbuchel
Atrial fibrillation after radiofrequency ablation of atrial flutter: preventive effect of angiotensin converting enzyme inhibitors, angiotensin II receptor blockers, and diuretics
Heart, September 1, 2004; 90(9): 1025 - 1030.
[Abstract] [Full Text] [PDF]


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Am. J. Pathol.Home page
H. D. Xiao, S. Fuchs, D. J. Campbell, W. Lewis, S. C. Dudley Jr, V. S. Kasi, B. D. Hoit, G. Keshelava, H. Zhao, M. R. Capecchi, et al.
Mice with Cardiac-Restricted Angiotensin-Converting Enzyme (ACE) Have Atrial Enlargement, Cardiac Arrhythmia, and Sudden Death
Am. J. Pathol., September 1, 2004; 165(3): 1019 - 1032.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
N. Hanna, S. Cardin, T.-K. Leung, and S. Nattel
Differences in atrial versus ventricular remodeling in dogs with ventricular tachypacing-induced congestive heart failure
Cardiovasc Res, August 1, 2004; 63(2): 236 - 244.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
P. L. L'Allier, A. Ducharme, P.-F. Keller, H. Yu, M.-C. Guertin, and J.-C. Tardif
Angiotensin-converting enzyme inhibition in hypertensive patients is associated with a reduction in the occurrence of atrial fibrillation
J. Am. Coll. Cardiol., July 7, 2004; 44(1): 159 - 164.
[Abstract] [Full Text] [PDF]


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CirculationHome page
D. G. Wyse and B. J. Gersh
Atrial Fibrillation: A Perspective: Thinking Inside and Outside the Box
Circulation, June 29, 2004; 109(25): 3089 - 3095.
[Full Text] [PDF]


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Circ. Res.Home page
S. Nattel
Defining "Culprit Mechanisms" in Arrhythmogenic Cardiac Remodeling
Circ. Res., June 11, 2004; 94(11): 1403 - 1405.
[Full Text] [PDF]


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JAMAHome page
J. P. Mathew, M. L. Fontes, I. C. Tudor, J. Ramsay, P. Duke, C. D. Mazer, P. G. Barash, P. H. Hsu, and D. T. Mangano
A Multicenter Risk Index for Atrial Fibrillation After Cardiac Surgery
JAMA, April 14, 2004; 291(14): 1720 - 1729.
[Abstract] [Full Text] [PDF]


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CirculationHome page
C.-T. Tsai, L.-P. Lai, J.-L. Lin, F.-T. Chiang, J.-J. Hwang, M. D. Ritchie, J. H. Moore, K.-L. Hsu, C.-D. Tseng, C.-S. Liau, et al.
Renin-Angiotensin System Gene Polymorphisms and Atrial Fibrillation
Circulation, April 6, 2004; 109(13): 1640 - 1646.
[Abstract] [Full Text] [PDF]


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QJMHome page
R.J. Shelton, G.C. Kaye, and J.G.F. Cleland
Controlling persistent atrial fibrillation
QJM, March 1, 2004; 97(3): 179 - 180.
[Full Text] [PDF]


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EuropaceHome page
P. Chandra, T. S. Rosen, Z.-H. Yeom, K. Lee, H.-Y. Kim, P. Danilo Jr, and M. R. Rosen
Evaluation of KCB-328, a new IKr blocking antiarrhythmic agent in pacing induced canine atrial fibrillation
Europace, January 1, 2004; 6(5): 384 - 391.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
H. Heidbuchel
A paradigm shift in treatment for atrial fibrillation: from electrical to structural therapy?
Eur. Heart J., December 1, 2003; 24(23): 2077 - 2078.
[Full Text] [PDF]


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Eur Heart JHome page
K.-C. Ueng, T.-P. Tsai, W.-C. Yu, C.-F. Tsai, M.-C. Lin, K.-C. Chan, C.-Y. Chen, D.-J. Wu, C.-S. Lin, and S.-A. Chen
Use of enalapril to facilitate sinus rhythm maintenance after external cardioversion of long-standing persistent atrial fibrillation: Results of a prospective and controlled study
Eur. Heart J., December 1, 2003; 24(23): 2090 - 2098.
[Abstract] [Full Text] [PDF]


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J. Thorac. Cardiovasc. Surg.Home page
Z. S. Jonjev, D. W. Schwertz, J. M. Beck, J. D. Ross, and W. R. Law
Subcellular distribution of protein kinase C isozymes during cardioplegic arrest
J. Thorac. Cardiovasc. Surg., December 1, 2003; 126(6): 1880 - 1885.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
S. Cardin, D. Li, N. Thorin-Trescases, T.-K. Leung, E. Thorin, and S. Nattel
Evolution of the atrial fibrillation substrate in experimental congestive heart failure: angiotensin-dependent and -independent pathways
Cardiovasc Res, November 1, 2003; 60(2): 315 - 325.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
B. D. Hoit
Matrix metalloproteinases and atrial structural remodeling
J. Am. Coll. Cardiol., July 16, 2003; 42(2): 345 - 347.
[Full Text] [PDF]


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J Am Coll CardiolHome page
P. Dorian and I. Mangat
Restoring sinus rhythm in atrial fibrillation: A pyrrhic victory?
J. Am. Coll. Cardiol., July 2, 2003; 42(1): 30 - 32.
[Full Text] [PDF]


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J Am Coll CardiolHome page
K. Kumagai, H. Nakashima, H. Urata, N. Gondo, K. Arakawa, and K. Saku
Effects of angiotensin II type 1 receptor antagonist on electrical and structural remodeling in atrial fibrillation
J. Am. Coll. Cardiol., June 18, 2003; 41(12): 2197 - 2204.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
H. U. Klein and A. Goette
Blockade of atrial angiotensin II type 1 receptors: A novel antiarrhythmic strategy to prevent atrial fibrillation?
J. Am. Coll. Cardiol., June 18, 2003; 41(12): 2205 - 2206.
[Full Text] [PDF]


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CirculationHome page
E. Vermes, J.-C. Tardif, M. G. Bourassa, N. Racine, S. Levesque, M. White, P. G. Guerra, and A. Ducharme
Enalapril Decreases the Incidence of Atrial Fibrillation in Patients With Left Ventricular Dysfunction: Insight From the Studies Of Left Ventricular Dysfunction (SOLVD) Trials
Circulation, June 17, 2003; 107(23): 2926 - 2931.
[Abstract] [Full Text] [PDF]


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J CARDIOVASC PHARMACOL THERHome page
G. C. Gronefeld and S. H. Hohnloser
Heart Failure Complicated by Atrial Fibrillation: Mechanistic, Prognostic, and Therapeutic Implications
Journal of Cardiovascular Pharmacology and Therapeutics, June 1, 2003; 8(2): 107 - 113.
[Abstract] [PDF]


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EuropaceHome page
I. Savelieva and A. John Camm
Atrial fibrillation and heart failure: natural history and pharmacological treatment
Europace, January 1, 2003; 5(s1): S5 - S19.
[Abstract] [Full Text] [PDF]


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CMAJHome page
P. Khairy and S. Nattel
New insights into the mechanisms and management of atrial fibrillation
Can. Med. Assoc. J., October 29, 2002; 167(9): 1012 - 1020.
[Abstract] [Full Text] [PDF]


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CirculationHome page
A. H. Madrid, M. G. Bueno, J. M.G. Rebollo, I. Marin, G. Pena, E. Bernal, A. Rodriguez, L. Cano, J. M. Cano, P. Cabeza, et al.
Use of Irbesartan to Maintain Sinus Rhythm in Patients With Long-Lasting Persistent Atrial Fibrillation: A Prospective and Randomized Study
Circulation, July 16, 2002; 106(3): 331 - 336.
[Abstract] [Full Text] [PDF]


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J Am Coll CardiolHome page
H. L. Kennedy and R. S. Rosenson
Physicians' interpretation of "class effects": A need for thoughtful re-evaluation
J. Am. Coll. Cardiol., July 3, 2002; 40(1): 19 - 26.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
M. Allessie, J. Ausma, and U. Schotten
Electrical, contractile and structural remodeling during atrial fibrillation
Cardiovasc Res, May 1, 2002; 54(2): 230 - 246.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
A. Goette, U. Lendeckel, and H. U Klein
Signal transduction systems and atrial fibrillation
Cardiovasc Res, May 1, 2002; 54(2): 247 - 258.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
S. Nattel
Therapeutic implications of atrial fibrillation mechanisms: can mechanistic insights be used to improve AF management?
Cardiovasc Res, May 1, 2002; 54(2): 347 - 360.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
A. Goette, G. Juenemann, B. Peters, H. U. Klein, A. Roessner, C. Huth, and C. Rocken
Determinants and consequences of atrial fibrosis in patients undergoing open heart surgery
Cardiovasc Res, May 1, 2002; 54(2): 390 - 396.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
K. Shinagawa, H. Mitamura, S. Ogawa, and S. Nattel
Effects of inhibiting Na+/H+-exchange or angiotensin converting enzyme on atrial tachycardia-induced remodeling
Cardiovasc Res, May 1, 2002; 54(2): 438 - 446.
[Abstract] [Full Text] [PDF]


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Cardiovasc ResHome page
Y. Shi, D. Li, J.-C. Tardif, and S. Nattel
Enalapril effects on atrial remodeling and atrial fibrillation in experimental congestive heart failure
Cardiovasc Res, May 1, 2002; 54(2): 456 - 461.
[Abstract] [Full Text] [PDF]


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CirculationHome page
J. McMurray and M. A. Pfeffer
New Therapeutic Options in Congestive Heart Failure: Part I
Circulation, April 30, 2002; 105(17): 2099 - 2106.
[Full Text] [PDF]


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CirculationHome page
Members of the Sicilian Gambit
New Approaches to Antiarrhythmic Therapy, Part I: Emerging Therapeutic Applications of the Cell Biology of Cardiac Arrhythmias
Circulation, December 4, 2001; 104(23): 2865 - 2873.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
Members of the Sicilian Gambit
New approaches to antiarrhythmic therapy; emerging therapeutic applications of the cell biology of cardiac arrhythmias
Eur. Heart J., December 1, 2001; 22(23): 2148 - 2163.
[Abstract] [PDF]


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Cardiovasc ResHome page
Members of the Sicilian Gambit
New approaches to antiarrhythmic therapy: emerging therapeutic applications of the cell biology of cardiac arrhythmias
Cardiovasc Res, December 1, 2001; 52(3): 345 - 360.
[Abstract] [Full Text] [PDF]


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CirculationHome page
D. Li, K. Shinagawa, L. Pang, T. K. Leung, S. Cardin, Z. Wang, and S. Nattel
Effects of Angiotensin-Converting Enzyme Inhibition on the Development of the Atrial Fibrillation Substrate in Dogs With Ventricular Tachypacing-Induced Congestive Heart Failure
Circulation, November 20, 2001; 104(21): 2608 - 2614.
[Abstract] [Full Text] [PDF]


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Eur Heart J SupplHome page
A.J. Camm
Future role of electrical therapy for atrial fibrillation: reality for all?
Eur. Heart J. Suppl., November 1, 2001; 3(suppl_P): P53 - P56.
[Abstract] [PDF]


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Cardiovasc ResHome page
Y. Shi, A. Ducharme, D. Li, R. Gaspo, S. Nattel, and J.-C. Tardif
Remodeling of atrial dimensions and emptying function in canine models of atrial fibrillation
Cardiovasc Res, November 1, 2001; 52(2): 217 - 225.
[Abstract] [Full Text] [PDF]


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Eur Heart JHome page
Guidelines for the management of patients with atrial fibrillation. A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to develop guidelines for the management of patients with atrial fibrillation) developed in collaboration with the North American Society of Pacing and Electrophysiology
Eur. Heart J., October 2, 2001; 22(20): 1852 - 1923.
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V. Fuster, L. E. Ryden, R. W. Asinger, D. S. Cannom, H. J. Crijns, R. L. Frye, J. L. Halperin, G. N. Kay, W. W. Klein, S. Levy, et al.
ACC/AHA/ESC guidelines for the management of patients with atrial fibrillation: A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to Develop Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the North American Society of Pacing and Electrophysiology
J. Am. Coll. Cardiol., October 1, 2001; 38(4): 1266 - 1266.
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