Native aortic valve annulus

The native aortic valve annulus is a complex, three-dimensional anatomical structure that serves as the fibrous attachment point for the aortic valve leaflets, separating the left ventricular outflow tract from the ascending aorta (StatPearls: Anatomy, Thorax, Heart Aortic Valve). While often modeled as a simple ring, it is actually a crown-shaped collagenous framework that provides structural integrity and facilitates the proper opening and closing of the valve during the cardiac cycle (PubMed: PMC4557018). This structure is primarily composed of dense connective tissue and is integrated into the fibrous skeleton of the heart (Wikipedia: Aortic Valve). In clinical practice, the annulus is a critical landmark for surgical and transcatheter aortic valve replacement (TAVR) procedures, where its dimensions determine the sizing of prosthetic valves (Journal of the American College of Cardiology: TAVR Sizing). Pathological changes such as calcification or dilation of the annulus can lead to aortic stenosis or regurgitation, significantly impacting cardiac hemodynamics (NIH: Aortic Valve Disease). Calcification of the annulus is a hallmark of calcific aortic valve disease, which is the most common cause of aortic stenosis in elderly populations (PubMed: 28838371). It is not a molecular target for pharmacological agents but rather a structural target for mechanical and prosthetic interventions. Complications involving the annulus during valve replacement, such as annular rupture or paravalvular leakage, represent significant clinical challenges (PubMed: 23948251).

Other names

Aortic annulusAortic valve ringVentriculo-aortic junction

Not applicable as this is an anatomical structure, not a molecular drug target.