Unveiling the Microvasculature: The Index of Microcirculatory Resistance and Its Expanding Role in Cardiovascular Care. - Sohn J; Soderstrom MA; Ramirez A; Dean JH; Shah R; Roy D; Stone K; Vinas A; Ramsey B; Lin C; Chilton R (Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions, 2026)