Which is one of the most commonly encountered congenital heart lesions diagnosed in adults?

Atrial septal defect (ASD) is indeed one of the most frequently diagnosed congenital heart lesions in adults. This condition involves a pomegranate-shaped opening or a hole in the atrial septum, which separates the left and right atria of the heart. While ASDs are often detected in childhood, many cases remain undiagnosed until adulthood because they may not present significant symptoms early on.

In adults, the presence of an ASD can lead to complications such as right heart overload, pulmonary hypertension, and arrhythmias over time. As people age, the increased volume load on the right side of the heart can become more pronounced, making it more likely for an ASD to be identified during routine health assessments or imaging studies.

This makes ASD a common topic of evaluation and consideration in adult cardiology, thus highlighting its prevalence as one of the more frequently encountered congenital heart lesions in the adult population.