Exercise Testing in the Detection of Severe Coronary Artery Disease

Summary: The clinical value of exercise testing in the detection of severe coronary artery disease remains undefined. This question was examined in 289 men and 45 women. The diagnosis of coronary artery disease could be reliably made without exercise testing in patients with angina pectoris which markedly restricted walking or which was accompanied by pathological Q waves on the ECG. Such patients usually had coronary artery disease involving two or three major vessels. Exercise testing was an aid to diagnosis in patients with a normal standard ECG and chest pain suspicious of myocardial ischaemia, either mild angina or atypical. When exercise testing resulted in both angina and ST segment depression in men, coronary artery disease was present in 38 of 41 (93%) of cases. On the other hand, three vessel disease was found in only six of 100 (6%) of men whose exercise test did not evoke angina and ST segment change. A normal exercise test in a woman with suspicious chest pain and a normal ECG was associated with normal coronary arteries in 14 of 15 (93%) of cases. It may be concluded that exercise testing is of most diagnostic value in the assessment of patients with a normal standard ECG and a differential diagnosis of mild angina pectoris and atypical chest pain.