The prevalence of microvascular obstruction in acute myocardial infarction: importance of ST elevation, infarct size, transmurality and infarct age

Results The population consisted of 147 (56%) patients with STEMI, 2 (0.8%) with left bundle branch block, and the remaining 117 (44%) with non-STEMI. The mean age was 59±13 years and 68% were male. The overall observed prevalence of MO was 53%. IS and transmurality were significantly larger in patients with MO than without (24% vs 7%, p 25%) or transmural extent was high (upper tertile, >80%) the prevalence of MO was similar (93% vs 92%, p=0.9; and 90% vs 85%, p=0.5, respectively). The prevalence of MO was dependent on both IS and