Premature ventricular contractions as the presenting feature of mitral valve prolapse in childhood.
D000293:Adolescent; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D005117:Cardiac Complexes, Premature / Q000209:etiology; D002648:Child; D004452:Echocardiography; D005260:Female; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008945:Mitral Valve Prolapse / Q000150:complications* / Q000175:diagnosis