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[Influence of reperfusion therapy on left ventricular remodeling after acute myocardial infarction].
To determine the relation between reperfusion therapy and left ventricular function and remodeling after acute myocardial infarction (AMI), 75 consecutive patients with anterior AMI were studied. The patients were divided into four groups according to the reperfusion outcome and time to reperfusion from onset of MI: 12 patients with spontaneous reperfusion, 18 patients with early (less than 4th) successful reperfusion, 16 patients with late (greater than or equal to 4th) successful reperfusion and 29 patients with unsuccessful reperfusion. The right oblique left ventriculograms (LVG), which was performed early (n = 19) and late after infarction (n = 75) were analyzed to assess left ventricular (LV) volume and global and regional LV function. At the late examination, spontaneous early and late reperfused patients showed smaller LV volume (endo diastolic and endo-systolic volume index) than unsuccessfully reperfused patients LV volume was similar in both early and late reperfused patients. Spontaneous and early reperfused patients showed higher LV ejection fraction (EF) and better regional wall motion (RWM) than unsuccessfully reperfused patients. Both EF and RWM was similar in late and unsuccessfully reperfused patients at the late examination. Endo-diastolic and endo-systolic volume index increased significantly with time in patients with unsuccessful reperfusion (n = 10), as compared with the index found in the early examination. In patients with late reperfusion (n = 5), end-diastolic volume index increased with time, but end-systolic volume index was unchanged. RMW improved in patients with early reperfusion (n = 4), but was unchanged in patients with late and unsuccessful reperfusion.(ABSTRACT TRUNCATED AT 250 WORDS)
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