Clinical correlates and prognostic significance of type A behavior and silent myocardial ischemia on the treadmill.

Siegel WC, Mark DB, Hlatky MA, Harrell FE, Pryor DB, Barefoot JC, Williams RB
Am J Cardiol. 1989 64 (19): 1280-3

PMID: 2589193 · DOI:10.1016/0002-9149(89)90568-7

Type A patients with coronary artery disease (CAD) tend to ignore or underreport symptoms, especially during challenging tasks such as the treadmill exercise test. To determine whether type A CAD patients might be more likely than type B patients to have silent ischemia during exercise and consequently a worse prognosis, 403 patients with stable CAD who had significant coronary disease on angiography, a positive Bruce protocol treadmill test and a structured interview to assess type A behavior were studied. Median follow-up time was 6 years. Type A patients were more likely to experience silent ischemia during exercise than were type B patients (35 vs 25%, p = 0.05). Patients with silent ischemia during exercise had a history of fewer anginal episodes/week, and type A patients with silent ischemia were less likely to have had a history of typical angina. However, using the Cox model, there were no significant differences in survival between type A patients and B patients with silent ischemia (4-year survival 86 vs 79%, p = 0.44) and no significant differences in survival between type A patients with silent ischemia and type A patients with symptomatic ischemia (6-year survival 86 vs 80%, p = 0.59). Similar results were obtained for infarction-free survival. Type A patients are more likely than type B patients to have silent ischemia during exercise, but long-term survival is not affected.

MeSH Terms (9)

Angina Pectoris Coronary Disease Electrocardiography Exercise Test Humans Prognosis Survival Analysis Time Factors Type A Personality

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