Beyond Coronary Artery Disease: Assessing the Microcirculation.

Area of Science:

• Cardiology
• Vascular Biology
• Internal Medicine

Background:

• Ischemic heart disease (IHD) impacts over 20 million US adults.
• Atherosclerosis of epicardial coronary arteries is the traditional cause of IHD.
• Nearly half of patients with stable angina and IHD lack obstructive epicardial coronary artery disease.

Purpose of the Study:

• To explore the significance of ischemia with nonobstructive coronary arteries (INOCA).
• To highlight coronary microvascular dysfunction (CMD) as a common cause of INOCA and microvascular angina.
• To emphasize the potential of improved understanding and management of CMD for IHD patient outcomes.

Main Methods:

• Review of current literature on IHD, INOCA, and CMD.
• Analysis of diagnostic approaches for coronary microvascular dysfunction.
• Discussion of therapeutic strategies for patients with microvascular angina.

Main Results:

• Coronary microvascular dysfunction (CMD) is a frequent underlying cause of ischemia in patients without obstructive epicardial coronary artery disease.
• Microvascular angina is a clinical manifestation of CMD.
• Current diagnostic and treatment paradigms for CMD are evolving.

Conclusions:

• CMD is a critical, often overlooked, contributor to ischemic heart disease.
• Further research into the pathophysiology, diagnosis, and treatment of CMD is essential.
• Addressing CMD offers a promising avenue to improve clinical outcomes for a significant patient population experiencing IHD.