5 Mar 2025 • A novel coronary angiography-based microvascular resistance (AMR) index has emerged as a potent predictor of long-term outcomes for patients undergoing transcatheter aortic valve replacement (TAVR).

A study involving patients with severe aortic stenosis found that an AMR value greater than 250 was significantly associated with higher rates of major adverse cardiovascular events, including all-cause mortality and new-onset atrial fibrillation.

With a median follow-up of 40 months, patients with AMR >250 had a notably lower event-free survival rate (62.9%) compared to those with AMR ≤250 (75.1%).

Source: AHA|ASA Journals | Read Full Story