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Infarct artery distribution and clinical outcomes in occluded artery trial subjects presenting with non-ST-segment elevation myocardial infarction (from the long-term follow-up of Occluded Artery Trial OAT ) Menon V; Ruzyllo W; Carvalho AC; Almeida de Sousa JM; Forman SA; Jaworska K; Lamas GA; Roik M; Thuaire C; Turgeman Y; Hochman JSAm J Cardiol 2013[Apr]; 111 (7): 930-5We hypothesized that the insensitivity of the electrocardiogram in identifying acute circumflex occlusion would result in differences in the distribution of the infarct-related artery (IRA) between patients with non-ST-segment elevation myocardial infarction (NSTEMI) and STEMI enrolled in the Occluded Artery Trial. We also sought to evaluate the effect of percutaneous coronary intervention to the IRA on the clinical outcomes for patients with NSTEMI. Overall, those with NSTEMI constituted 13% (n = 283) of the trial population. The circumflex IRA was overrepresented in the NSTEMI group compared to the STEMI group (42.5 vs 11.2%; p <0.0001). The 7-year clinical outcomes for the patients with NSTEMI randomized to percutaneous coronary intervention and optimal medical therapy versus optimal medical therapy alone were similar for the primary composite of death, myocardial infarction, and class IV congestive heart failure (22.3% vs 20.2%, hazard ratio 1.20, 99% confidence interval 0.60 to 2.40; p = 0.51) and the individual end points of death (13.8% vs 17.0%, hazard ratio 0.82, 99% confidence interval 0.37 to 1.84; p = 0.53), myocardial infarction (6.1 vs 5.1%, hazard ratio 1.11, 99% confidence interval 0.28 to 4.41; p = 0.84), and class IV congestive heart failure (6.7% vs 6.0%, hazard ratio 1.50, 99% confidence interval 0.37 to 6.02; p = 0.45). No interaction was seen between the electrocardiographically determined myocardial infarction type and treatment effect (p = NS). In conclusion, the occluded circumflex IRA is overrepresented in the NSTEMI population. Consistent with the overall trial results, stable patients with NSTEMI and a totally occluded IRA did not benefit from randomization to percutaneous coronary intervention.|*Electrocardiography[MESH]|Aged[MESH]|Confidence Intervals[MESH]|Coronary Occlusion/complications/*diagnosis/mortality/*therapy[MESH]|Female[MESH]|Heart Failure/etiology[MESH]|Humans[MESH]|Male[MESH]|Middle Aged[MESH]|Myocardial Infarction/complications/*diagnosis/mortality/*therapy[MESH]|Percutaneous Coronary Intervention[MESH]|Proportional Hazards Models[MESH]|Retrospective Studies[MESH]|Sensitivity and Specificity[MESH]|Survival Rate[MESH]|Treatment Outcome[MESH] |
