Grade 3 ischemia on the admission electrocardiogram predicts failure of ST resolution and of adequate flow restoration after primary percutaneous coronary intervention for acute myocardial infarction

BACKGROUND: Failure of ST-segment resolution (STR) after primary percutaneous coronary intervention (PPCI) for ST-elevation myocardial infarction is associated with adverse outcome but currently cannot be predicted on admission. Our aim was to determine whether failure of STR can be predicted from clinical and electrocardiographic data available on admission and whether the adverse outcome associated with grade 3 ischemia (distortion of the …