Scintigraphic predictor of left ventricular size after acute myocardial infarction.
The aim of this study was to evaluate the relation between thallium-201 scintigraphic indices and left ventricular size after acute myocardial infarction. Forty-seven patients with acute myocardial infarction underwent rest-redistribution thallium-201 scintigraphy at 2 weeks and left ventriculography at 4 weeks, after the onset of myocardial infarction. Percent (%) fixed defect, %redistribution and %reverse redistribution, calculated as a percentage of whole left ventricular area, were quantified with computer-generated unfolded map method of the myocardial radioactivity. Despite no significant difference in peak plasma creatine phosphokinase between the two groups, patients with anterior myocardial infarction (28 patients) had larger %fixed defect (p < 0.01), which was associated with higher end-diastolic pressure (p < 0.05) and larger end-diastolic volume index (p < 0.01) than those with inferior myocardial infarction (19 patients). End-diastolic volume index was not related to %redistribution and %reverse redistribution, but there was a good relation between end-diastolic volume index and %fixed defect in anterior (r = 0.79, p < 0.001) and in inferior (r = 0.73, p < 0.001) myocardial infarction. However, left ventricular end-diastolic volume index in anterior myocardial infarction was larger than that of inferior myocardial infarction at any given %fixed defect. Thus, site as well as size of fixed defect at 2 weeks after the onset of acute myocardial infarction was related to left ventricular end-diastolic volume at chronic phase.
Abe
Y
Y
Second Department of Internal Medicine and Department of Radiology Kansai Medical University, Osaka, Japan.
Sugiura
T
T
Suga
Y
Y
Takehana
K
K
Kamihata
H
H
Karakawa
M
M
Inada
M
M
Iwasaka
T
T
D015906:Angioplasty, Balloon, Coronary; D003402:Creatine Kinase / Q000097:blood; D005260:Female; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000097:blood / Q000000981:diagnostic imaging* / Q000201:enzymology / Q000209:etiology / Q000503:physiopathology; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000628:therapy; D011877:Radionuclide Imaging; D013318:Stroke Volume; D013794:Thallium Radioisotopes
D013794:Thallium Radioisotopes; D003402:Creatine Kinase