[Evaluation of acute myocardial infarction by 201T1 single-photon emission computed tomography using scoring system]

In 36 patients with acute myocardial infarction (AMI) 201T1 single-photon emission computed tomography (SPECT) examinations were performed in a relatively early phase of AMI. The short and long axis views of the left ventricle (LV) were divided into 6 segments. Images of each segment were assigned scores (segmental scores) based on a visual evaluation of the extent of 210T1 accumulations as follows: 1 = normal; 2 = relatively low; 3 = low; 4 = severely low; 5 = cold. The sum total of the segmental scores constituted the SPECT score. SPECT scores were compared with maxGOT, maxLDH, maxCPK and maxCK-MB, Killip classification and Forrester hemodynamic subset on admission, and LV ejection fraction (LVEF). Segmental scores were compared with LV wall motion evaluated by left ventriculography. The results are summarized as follows: 1) There were significant correlations between SPECT scores and maxGOT, maxLDH, maxCPK and maxCK-MB (r = 0.62, r = 0.60, r = 0.51 and r = 0.39, respectively). 2) SPECT scores in patients with Killip group III were significantly higher than in patients with Killip group I + II (p less than 0.05). However, no significant differences in maxGOT, maxLDH, maxCPK and maxCK-MB were observed between patients with Killip group III and those with Killip group I + II. 3) SPECT scores were significantly higher in patients with Forrester group III + IV than in patients with Forrester group I + II (p less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)