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Comparative effectiveness of exercise electrocardiography with or without myocardial perfusion single photon emission computed tomography in women with suspected coronary artery disease: results from the What Is the Optimal Method for Ischemia Evaluation

Abstract：

BACKGROUND:There is a paucity of randomized trials regarding diagnostic testing in women with suspected coronary artery disease (CAD). It remains unclear whether the addition of myocardial perfusion imaging (MPI) to the standard ECG exercise treadmill test (ETT) provides incremental information to improve clinical decision making in women with suspected CAD. METHODS AND RESULTS:We randomized symptomatic women with suspected CAD, an interpretable ECG, and ≥5 metabolic equivalents on the Duke Activity Status Index to 1 of 2 diagnostic strategies: ETT or exercise MPI. The primary end point was 2-year incidence of major adverse cardiac events, defined as CAD death or hospitalization for an acute coronary syndrome or heart failure. A total of 824 women were randomized to ETT or exercise MPI. For women randomized to ETT, ECG results were normal in 64%, indeterminate in 16%, and abnormal in 20%. By comparison, the exercise MPI results were normal in 91%, mildly abnormal in 3%, and moderate to severely abnormal in 6%. At 2 years, there was no difference in major adverse cardiac events (98.0% for ETT and 97.7% for MPI; P=0.59). Compared with ETT, index testing costs were higher for exercise MPI (P<0.001), whereas downstream procedural costs were slightly lower (P=0.0008). Overall, the cumulative diagnostic cost savings was 48% for ETT compared with exercise MPI (P<0.001). CONCLUSIONS:In low-risk, exercising women, a diagnostic strategy that uses ETT versus exercise MPI yields similar 2-year posttest outcomes while providing significant diagnostic cost savings. The ETT with selective follow-up testing should be considered as the initial diagnostic strategy in symptomatic women with suspected CAD. CLINICAL TRIAL REGISTRATION:http://www.clinicaltrials.gov. Unique identifier: NCT00282711.

journal_name

Circulation

journal_title

Circulation

authors

Shaw LJ,Mieres JH,Hendel RH,Boden WE,Gulati M,Veledar E,Hachamovitch R,Arrighi JA,Merz CN,Gibbons RJ,Wenger NK,Heller GV,WOMEN Trial Investigators.

doi

10.1161/CIRCULATIONAHA.111.029660

subject

Has Abstract

pub_date

2011-09-13 00:00:00

pages

1239-49

issue

eissn

0009-7322

issn

1524-4539

pii

CIRCULATIONAHA.111.029660

journal_volume

124

pub_type

杂志文章,随机对照试验

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Comparative effectiveness of exercise electrocardiography with or without myocardial perfusion single photon emission computed tomography in women with suspected coronary artery disease: results from the What Is the Optimal Method for Ischemia Evaluation