Kou Takeda

Effects of emergency coronary angioplasty on left ventricular volume after acute myocardial infarction compared with intracoronary thrombolysis

BackgroundThe effects of emergency coronary angioplasty on left ventricular remodeling have not been fully evaluated. We compared the effects of emergency coronary angioplasty on left ventricular volume with those of intracoronary thrombolysis in patients suffering from their first acute myocardial infarction (AMI). MethodsA total of 51 patients who had a culprit lesion at site No 6 of the American Heart Association (AHA) classification were analyzed. Patients with re-obstruction of the culprit lesion after reperfusion were excluded from the study. The coronary angioplasty and the thrombolysis groups consisted of 28 and 23 patients, respectively. Left ventricular volume was measured by left ventriculography at 4 weeks after infarction. ResultsClinical and angiographic background factors showed no significant differences between these two groups. The left ventricular end-systolic volume index was significantly smaller in the angioplasty group than in the thrombolysis group (31 ± 14 versus 45 ± 14ml/m2, P < 0.01). Similarly, the left ventricular end-diastolic volume index was significantly smaller in the angioplasty group (64 ± 13 versus 82+ 13ml/m2, P < 0.01). Conversely, the left ventricular ejection fraction was larger in the angioplasty group than in the thrombolysis group (54 ± 13 versus 45± 13%, P < 0.05). Multivariate analysis revealed that the selection of coronary angioplasty was one of the factors significantly associated with a decrease in left ventricular end-systolic and end-diastolic volume. ConclusionThese results suggest that emergency coronary angioplasty produces better left ventricular remodeling than intracoronary thrombolysis after AMI.