Transthoracic echocardiography (TTE): anterior mitral valve prolapse in parasternal (A) and apical long-axis (B) views. C, bileaflet mitral valve prolapse, apical 4-chamber view; the dotted line marks the level of the mitral annulus. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle.