[A study of the quantification of (201)TI myocardial scintigrams of prior myocardial infarctions and their influence on left ventricular function (author's transl)].

(201)TI myocardial scintigraphy was performed on 25 cases of prior myocardial infarction, and based upon phantom experiments, the infarct size was quantitatively analyzed as a defect segment percentage (DS%). DS% was compared to the left cardiac function obtained from myocardial scintigrams, RI angiocardiograms, and chest X-ray films, and the results were examined. There was a high degree of correlation between DS% and LVEF and LVEDV/ m(2) (R=-0.72, 0.84). Where DS% was less than 25%, the left ventricular function was almost normal, and where DS% was greater than 25%, deterioration could clearly be seen. There was a correlation between left ventricular volume from myocardial scintigrams and heart volume from chest X-ray films. The (201)TI uptake in the lung field from myocardial scintigrams increased as the infarct size increased, and the uptake in the upper lungs also increased.