doi: 10.1161/01.CIR.0000109491.66226.26
(Circulation. 2004;109:580-586.)
© 2004 American Heart Association, Inc.
Clinical Investigation and Reports |
Differential Expression of Cardiac Biomarkers by Gender in Patients With Unstable Angina/Non–ST-Elevation Myocardial Infarction
A TACTICS-TIMI 18 (Treat Angina with Aggrastat and determine Cost of Therapy with an Invasive or Conservative Strategy–Thrombolysis In Myocardial Infarction 18) Substudy
From the Cardiovascular Division (S.D.W., C.P.C., D.A.M., C.H.M., M.S.S., R.P.G., E.M.A., E.B.), Brigham and Women’s Hospital, The TIMI Study Group (S.D.W., C.P.C., D.A.M., S.A.M., C.M.G., C.H.M., M.S.S., R.P.G., E.M.A., E.B.), Beth Israel Deaconess Medical Center (C.M.G.), and Boston Children’s Hospital (N.R.), Boston, Mass; and Merck, Inc (P.M.D., L.A.D.), West Point, Pa.
Correspondence to Stephen D. Wiviott, MD, The TIMI Study Group, Cardiovascular Division, Brigham and Women’s Hospital, 75 Francis St, Boston, MA 02115. E-mail swiviott{at}partners.org
Received May 14, 2003; de novo received August 20, 2003; revision received October 10, 2003; accepted October 13, 2003.
Background— Diagnosis of coronary artery disease in women is more difficult because of lower specificity of symptoms and diagnostic accuracy of noninvasive testing. We sought to examine the relationship between gender and cardiac biomarkers in patients with unstable angina (UA)/non–ST-segment elevation myocardial infarction (NSTEMI).
Methods and Results— In the TACTICS-TIMI 18, OPUS-TIMI 16, and TIMI 11 studies, baseline samples were analyzed in the Thrombolysis In Myocardial Infarction (TIMI) biomarker core laboratory. We examined the relationship between gender and elevated biomarkers. Of 1865 patients from TACTICS-TIMI 18, 34% were women. Fewer women had elevated creatine kinase-MB or troponins, whereas more had elevated high-sensitivity C-reactive protein or brain natriuretic peptide. Presence of ST-segment deviation and TIMI risk scores were not significantly different. This pattern was confirmed in TIMI 11 and OPUS-TIMI 16. The prognostic value of the markers in TACTICS-TIMI 18 was similar in women and men. When a multimarker approach was examined, a greater proportion of high-risk women were identified. Marker-positive patients of both genders had improved outcome with an invasive strategy; however, marker-negative women appeared to have improved outcomes with a conservative strategy.
Conclusions— In patients with UA/NSTEMI, there was a different pattern of presenting biomarkers. Men were more likely to have elevated creatine kinase-MB and troponins, whereas women were more likely to have elevated C-reactive protein and brain natriuretic peptide. This suggests that a multimarker approach may aid the initial risk assessment of UA/NSTEMI, especially in women. Further research is necessary to elucidate whether gender-related pathophysiological differences exist in presentation with acute coronary syndromes.
Key Words: cardiovascular diseases • natriuretic peptides • creatine kinase • inflammation • women
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