The right ventricular ejection fraction was determined in 58 patients with simultaneous right and left ventricular myocardial infarction and in 77 patients with only left ventricular myocardial infarction. The results were analysed in four groups of patients (patients with anterior, anterior and right ventricular, posterior, posterior and right ventricular myocardial infarction). Furthermore, the relation between left and right ventricular ejection fraction, stress capacity and heart volume was investigated. There was no influence of the age and gender of patients on the observed values of right and left ventricular ejection fraction. In younger patients, after myocardial infarction, the heart volume was found to be less and the stress capacity to be higher then in elderly patients. The right ventricular ejection fraction was normal in patients with "poor" left ventricular infarction, and it was decreased in patients with right ventricular myocardial infarction. The right ventricular ejection fraction did not influence the stress capacity and the heart volume of the patients. The left ventricular ejection fraction found to be less in anterior, compared to posterior myocardial infarction. This difference was independent on the presence of right ventricular infarction. The authors consider the decreased right ventricular ejection fraction as a valuable indicator of the abnormal contractility of the right ventricle even at the time of the rehabilitation after myocardial infarction.
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