ABSTRACT
During treadmill exercise, 57 patients with documented coronary heart disease (CHD) were studied for the change patterns in R wave amplitudes in V5 lead by analyzing ECG on a computer. With exercise, 86% of CHD patients showed higher or no R wave amplitude changes, whereas 73.7% of healthy subjects displayed its lower changes. Increased or no R wave amplitude changes in CHD patients was accompanied by more marked quantitative ischemic parameters than their decrease. A significant correlation was found between higher R wave amplitude and extended exercise-induced myocardial ischemia. Decreased R wave amplitude was associated with local ischemic shifts. Comparison of the data obtained from the computer-assisted ECG analysis and radiocardiometric findings during the exercise test demonstrated that an increase m R wave amplitude in CHD patients was followed by higher cardiac volume, which indicated ischemic myocardial dysfunction.
Subject(s)
Coronary Disease/diagnosis , Electrocardiography , Adult , Diagnosis, Computer-Assisted , Electrocardiography, Ambulatory , Exercise Test , Humans , Male , Middle AgedABSTRACT
A study was made of the time course of lesser circulation (LC) in 80 patients with acute transmural myocardial infarction and in 20 patients with chronic coronary heart disease with the help of chest x-ray. A possibility of preclinical detection of left ventricular insufficiency was confirmed. The capacity of roentgenography to reflect objectively the time course of LC disorder and its correlation with primary determination of a degree of changes, age, cardiac sizes, the expression of aortic atherosclerosis, pleurocardiac reactions and site of myocardial infarction were defined.
