Coronary arterial dominance associated with congenital bicuspid aortic valve

Area of Science:

• Cardiovascular Anatomy
• Congenital Heart Disease
• Coronary Artery Anatomy

Background:

• The coronary arteries supply blood to the heart muscle.
• Coronary artery dominance describes the source of the posterior descending coronary artery.
• Aortic valve morphology (bicuspid vs. tricuspid) and aortic arch anomalies can influence cardiovascular development.

Purpose of the Study:

• To investigate the relationship between aortic valve type and coronary artery dominance.
• To examine the prevalence of left coronary dominance in individuals with congenital bicuspid aortic valves versus tricuspid aortic valves.
• To assess the association between coarctation of the aorta and coronary artery dominance.

Main Methods:

• Gross examination of 186 adult hearts.
• Assessment of aortic valve morphology (bicuspid or tricuspid).
• Determination of the origin of the posterior descending coronary artery to define coronary dominance (right or left).

Main Results:

• The incidence of left coronary dominance was 24.4% in hearts with congenital bicuspid aortic valves.
• The incidence of left coronary dominance was 9.5% in hearts with tricuspid aortic valves.
• Coarctation of the aorta cases exhibited a higher tendency for left coronary dominance compared to the general population.

Conclusions:

• Congenital bicuspid aortic valves are associated with a significantly higher prevalence of left coronary dominance.
• Left coronary dominance appears more common in individuals with coarctation of the aorta, irrespective of aortic valve type.
• These findings highlight potential anatomical variations in coronary artery supply related to specific congenital cardiac conditions.