Mitral valve prolapse refers to:

Mitral valve prolapse is characterized by the flaps of the mitral valve not closing completely, allowing for a bulging or prolapse into the left atrium during ventricular contraction. This condition can lead to regurgitation, where blood leaks backward into the atrium. It is a common heart valve disorder, often asymptomatic, but may cause symptoms in some individuals, such as palpitations or chest pain.

The answer accurately describes the main issue associated with mitral valve prolapse, which is the incomplete closure of the valve flaps. Understanding this dysfunction is crucial in the context of cardiovascular health, as mitral valve problems can impact heart functioning and overall wellness.