Abstract
In order to evaluate the left ventricular function in patients with myocardial infarction, echocardiographic analysis of the left ventricular function was made during ergometer exercise with monitoring heart rate, blood pressue, ECG and Symptom.
The materials consisted of 23 patients with myocardial infarction and 20 normal subjects as a control. The graded exercise was performed in supine position on the bed. Echocardiographic parameters, such as % change in diameter (%ΔD), maximal posterior wall velocity in systole (Max PWV), maximal posterior velocity in diasole (-Max PWV), % change in thickness of the septum (%ΔThs) and that of the posterior wall (%ΔThp), were measured at rest, during and after exercise. In the patients with myocardial infarction, echocardiographic indicies revealed abnormal motions of the wall including infarcted area and impaired left ventricular function after exercise. This tendency was not found out in the control group. Exercise echocardiography appears to be useful to detect wall motion abnormalities and to evaluate cardiac function of the patients with myocardial infarction.
