The clinical study of the myocardial scintigraphy used by 201Tl

Myocardial scintigraphy was performed with 201Tl. The results were analyzed according to followings: (1) analyses of myocardial scintigrams from controls, (2) relationship between this scintigram and ECG in the patient with myocardial infarction, (3) comparison of myocardial scintigrams from the patients with congestive cardiopathy with those from hypertrophic cardiopathy. (1) In controls, the images showed homogenous accumulation of the radioisotopes and shape either of horseshoe in anterior or left lateral view, or of circle or oval in left anterior 450 oblique view. (2) In many patients with myocardial infarction, the infarcted area suggested by ECG was coincided with that by scintigram and the scintigram was suggested to be useful as one of the diagnostic techniques. However, it is difficult to identify the infarcted area in some patients with widespread infarction. (3) The scintigram was more effective to diagnose hypertrophic cardiopathy. (Nishio, M.)