High dose dipyridamole-echocardiography test in women: correlation with exercise-electrocardiography test and coronary arteriography

Istituto del Consiglio Nazionale delle Ricerche, University of Pisa, Italy.

The value of the exercise-electrocardiography test in detecting coronary artery disease in women is limited. Recently, the high dose dipyridamole-echocardiography test (two-dimensional echocardiographic monitoring during intravenous dipyridamole infusion, up to 0.84 mg/kg body weight over 10 min) was proposed as an alternative to exercise testing for the diagnosis of coronary artery disease. To establish the diagnostic usefulness of the exercise-electrocardiography and dipyridamole-echocardiography tests in this disease, the two tests were performed--on different days and in random order--in 83 consecutive women evaluated for a chest pain syndrome. All 83 women had taken no medications for greater than 48 h, and 15 had had a previous myocardial infarction. Positivity of the dipyridamole-echocardiography test was based on detection of a transient asynergy of contraction that was absent or of lesser degree at rest; the exercise-electrocardiography test (by upright cycloergometer) was considered positive when the ST segment was shifted greater than 0.1 mV 0.08 s after the J point. Coronary angiography showed significant coronary artery disease (greater than 70% luminal reduction of at least one major coronary vessel) in 39 women. No significant complications occurred in any patient during either test. Sensitivity and predictive value of a negative test were similar for the dipyridamole-echocardiography and the exercise-electrocardiography test (79 versus 72% and 84 versus 68%, respectively, whereas the dipyridamole-echocardiography test had greater specificity (93 versus 52%, p less than 0.001), accuracy (87 versus 62%, p less than 0.001) and a higher predictive value of a positive test (91 versus 57%, p less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)

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