What is the prevalence of Bicuspid Aortic Valve?

Bicuspid Aortic Valve (BAV) is the most common congenital heart defect, affecting approximately 0.5% to 2% of the general population. While often identified in adulthood, true prevalence is likely higher due to many asymptomatic individuals remaining undiagnosed throughout their lives.

What is the prevalence and incidence of Bicuspid Aortic Valve?

Bicuspid Aortic Valve is considered a common congenital condition rather than a rare disease in the traditional sense, though it is the most frequent cause of valvular heart disease. Estimates suggest a prevalence of 1 in 50 to 1 in 200 people. Because it is a congenital anomaly present at birth, incidence is synonymous with the birth prevalence of the defect.

Are there demographic differences in Bicuspid Aortic Valve?

Research consistently indicates that Bicuspid Aortic Valve affects males more frequently than females, with a ratio often cited between 2:1 and 3:1. While Bicuspid Aortic Valve is present from birth, clinical onset of symptoms typically occurs in adulthood (ages 40–60) as the valve begins to calcify or degenerate, though it can present in childhood if the valve is severely stenotic or regurgitant.

Why is accurate data for Bicuspid Aortic Valve challenging to obtain?

The true prevalence of Bicuspid Aortic Valve is difficult to capture for several reasons:

• Asymptomatic presentation: Many individuals with a Bicuspid Aortic Valve never experience symptoms and are never diagnosed.


• Incidental findings: Diagnosis often occurs only during echocardiograms performed for unrelated reasons.


• Underdiagnosis: Mild cases may be overlooked, leading to an underestimation of the condition's total reach in the population.


• Community Insights: Within the DiseaseMaps.org community, 142 individuals have shared their experiences, providing a vital, real-world perspective that complements clinical statistics by highlighting the diagnostic journey of those living with the condition.

Next steps

• Consult a cardiologist or a specialist in congenital heart disease for regular echocardiographic monitoring.


• Discuss family screening with a genetic counselor, as Bicuspid Aortic Valve often has a familial component.


• Join the DiseaseMaps.org community to connect with others who have been diagnosed with a Bicuspid Aortic Valve.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment from a qualified healthcare provider.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Bicuspid Aortic Valve.


• Orphanet: Bicuspid aortic valve (ORPHA:99974).


• OMIM (Online Mendelian Inheritance in Man): Aortic Valve, Bicuspid.


• American Heart Association (AHA): Congenital Heart Defects in Adults.