Angiography-derived index of microcirculatory resistance to define the risk of early discharge in STEMI by Scarsini, R, Kotronias, RA, Della Mora, F, Portolan, L, Andreaggi, S, Benenati, S, Marin, F, Sgreva, S, Comuzzi, A, Butturini, C, Pesarini, G, Tavella, D, Channon, KM, Garcia Garcia, HM, Ribichini, F, Banning, AP, De Maria, GL