Myocardial damage determined by CMR demonstrated a graded relationship of infarct size ( median ( IQR ) @ ( @-@ @ ) % LV vs @ ( @-@ @ ) % LV vs @ ( @-@ @ ) % LV , p < @ ) , the myocardial salvage index ( @ ( @-@ @ ) vs @ ( @-@ @ ) vs @ ( @-@ @ ) , p < @ ) , and microvascular obstruction ( @ ( @-@ @ ) % LV vs @ ( @-@ @ ) % LV vs @ ( @-@ @ ) % LV , p < @ ) across the three groups .