Echocardiography (A) Portable echocardiography that performed immediately after coronary angiography showed severe mitral regurgitation and systolic flow acceleration of left ventricular outflow tract obstruction on Hospital day 1. (B) On follow up echocardiogram after intra-aortic balloon pump weaning, mitral regurgitation completely disappeared. (Hospital day 3) (C) On follow up echocardiography after intra-aortic balloon pump weaning (Hospital Day 3), Vmax is 1.5 m/sec and peak pressure gradient is 8.9 mmHg at resting state. At Valsalva maneuver, Vmax is 3.1 m/sec and peak pressure gradient is 38.9 mmHg. LA, Left atrium; LV, Left ventricle; RV, Right ventricle; Vmax , maximum velocity.