Low prevalence of mitral valve prolapse in bipolar affective disorder.

The authors report the prevalence of mitral valve prolapse in bipolar affective disorder. 22 bipolar patients (13 men and 9 women; age 17-75 years, mean 42.3) were selected at random from 41 bipolar patients for echocardiographic examination. Diagnosis of mitral valve prolapse was made if prolapsus of the anterior or posterior valve to the left atrium was seen in the two-dimensional echocardiography and if mid-to late-systolic posterior motion of the mitral valve was greater than 2 mm in M-mode echocardiography. Of the 22 bipolar patients, only two had mitral valve prolapse. This rate does not differ significantly from the 5% rate found in the general population.