Radionuclide evaluation of left ventricular function by means of the gamma camera and gating currently appears to be the most reliable noninvasive method for approximating angiographic evaluation of left ventricular performance.

Utilizing the radionuclide angiography, we measured the left ventricular function in 19 normal healthy control, 60 patients with coronary artery diseases 7 patients with dilated cardiomyopathy, 5 patients with hypertension.

1) Left ventricular ejection fraction decreased in 12 patients with anterior myocardial infarction (39.9±11.6%), 17 patients with inferior myocardial infarction (49.9±8.4%) and 7 patients with dilated cardiomyopathy (19.0±5.8%), and there was a statistically significant difference compared with 19 normal control group (63.5±8.2%)(p<0.005). However there were no statistically significant difference between normal control group, patients with hypertension (58.8±7.6%) and patients with angina pectoris (60.1±6.5%).

2) Left ventricular ejection fraction decreased in both anterior and inferior myocardial infarction, and there was a statisically significant difference between both groups (p<0.01).

All 13 patients with acute myocardial infarction had abnormal LVEF (40.5±9.1%) whcih was significantly lower than that of 16 patients with old myolardial infarction (50.1±10.5%)(p<0.01).