Abstract 13863: Stress Echocardiography in Asymptomatic Patients: Impact of Clinical Risk Profile on Test Results
Introduction: Stress echocardiography (SE) has an established role in the evaluation of symptomatic patients, but its utility in asymptomatic patients is unclear. Current guidelines discourage the use of SE in most asymptomatic patients, citing lack of data to support its use. We therefore sought to describe the yield of SE in a group of asymptomatic individuals according to risk profile.
Hypothesis: We hypothesized that SE would rarely be abnormal in asymptomatic individuals.
Methods: We conducted a retrospective cohort study of all asymptomatic individuals who underwent exercise or pharmacologic SE between 2003 and 2013. Reasons for SE included screening for CAD, preoperative evaluation, abnormal ECG, coronary calcification, and assessment of established CAD (defined as prior myocardial infarction or coronary revascularization). We grouped subjects using both the 10-year Framingham risk equation and ATP3-suggested categories of low-risk (<10%), intermediate-risk (10-20%), and high-risk (>20%) for non-diabetic subjects without known CAD and by ACC/AHA Pooled Cohort risk estimates for subjects with and without diabetes. Subjects with established CAD were considered separately. Abnormal echocardiograms were defined as having ischemic, fixed, or mixed defects.
Results: The study population comprised 19,170 subjects; 63% men, mean±SD age was 64±13 years, and 52% underwent pharmacologic SE. The likelihood of abnormal SE results was proportional to risk, with the highest yield in those with established CAD (59%). Those with diabetes had a yield similar to those with a 10 year risk of 10-20% by both ATP3/FRS and ACC/AHA.
Conclusions: SE abnormalities are commonly seen in asymptomatic individuals; the likelihood of abnormal SE results was proportional to patients’ estimated risk. The frequency of SE abnormalities in diabetic patients is similar to that of intermediate-risk, but not high-risk patients.
Author Disclosures: A.D. Calvin: None. A.M. Arruda-Olson: None. P.A. Pellikka: None. C.G. Scott: None. R.B. McCully: None.
- © 2014 by American Heart Association, Inc.