What are the symptoms of mitral valve prolapse?

Often little to none. Mitral valve prolapse is a disorder of the mitral valve which affects the way it closes. Most of the time this results in little no leak. As long as there is little to no leak most patients will have no symptoms. Most patients with mitral valve prolapse probably don't even know about it. If there are symptoms usually they are related to an increase in the leakage of the valve.
Palpaitations. If its mild no symptoms are likely . If moderate palpitaions and some shortness of breath with exercise . Severe mvp usually reults in significant regurgitation with atrial fibrillation and possible heart failure.