Introduction
microvascular dysfunction, Microvascular angina pectoris
Microvascular angina pectoris (MVA) is a complex clinical condition in which functional and/or structural changes in the coronary microcirculation determine an increase in vascular tone compromising myocardial perfusion.Empirical observations suggest that implantation of a coronary sinus reducer may improve myocardial perfusion and decrease symptoms in patients with microvascular anginaThe study presented here aimed to investigate whether an increase in coronary sinus pressure may lead to a measurable change in coronary microvascular resistance in patients with microvascular dysfunction, which may pave the way for an interventional approach.