Copyright © 1985 by the European Society of Cardiology.
© 1985 The European Society of Cardiology
Prognostic value of symptom limited exercise testing in men with a high prevalence of coronary artery disease
*Division of Cardiology, Saint-Luc University Hospital Brussels, Belgium
Thoraxcenter, Erasmus University Rotterdam, The Netherlands
Received 9 April 1985; revised 17 July 1985; .
Address for Correspondence:J. M. R. Detry, M. D., Saint-Lus Univesity Hospital, Division of Cardiology, Avenue Hippocrate 10, B-1200 Bruxelles
Abstract
In order to evaluate the independent prognostic information provided by exercise testing in populations with a high prevalence of coronary artery disease, survival rates were calculated with the life table method in 372 men, mean age 48 years, referred for coronary arteriography. The prevalence of angiographic coronary artery disease was 82%. During a mean follow-up of 29 months (1 to 8 years), 32 patients died and 27 patients had a nonfatal event (acute infarction or hospitalization for disabling angina). Both the history (presence or absence of typical angina pectoris or of a previous myocardial infarction) and the exercise test results (abnormal if angina and/or ST segment changes greater or equal to 0.1 mV occurred) had a significant prognostic value for the 5 year survival rate (P < 0.001). In patients with a positive history, the 5 year cumulative survival rate was 76% if the exercise test was abnormal versus 94% if it was normal (P < 0.001). The following 8 noninvasive and 2 invasive variables were submitted to a Cox regression analysis: age, typical angina pectoris, previous myocardial infarction, maximal heart rate and workload, maximal ST segment depression and elevation, angina pectoris during exercise testing, number of diseased vessels, and wall motion score on contrast ventriculography. By univariate analysis, the age and the maximal workload reached during exercise were the only noninvasive predictive variables for survival or cardiac events (P<0.05). By multivariate analysis, and combining all noninvasive and invasive variables, survival was predicted by the wall motion score, the presence or absence of 3 vessel disease, and age. Considering all events, beside the three variables listed above, the maximal workload during exercise testing contributed significantly (P<0.001) and independently to the model. Thus even in populations with a high prevalence of coronary artery disease, exercise testing does provide prognostic information which is not available either from the history or from cardiac catheter ization.
Key Words: Prognosis in coronary artery disease • exercise testing.
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