Case of transient mid-ventricular ballooning syndrome with a rapid and uncommon recovery.

A 60-year-old woman presented with acute pulmonary edema followed by cardiopulmonary arrest due to idiopathic ventricular fibrillation. Owing to immediate cardioversion, her electrocardiogram showed sinus rhythm and echocardiography did not show any wall motion abnormalities. The next day, echocardiographic re-examination was characterized by akinesis of both apical and mid segments of the left ventricle. One hour later, subsequently performed coronary angiography revealed non-occlusive coronary artery disease, but left ventriculography demonstrated only akinesis of mid-ventricular segment with hypercontractile other segments. Further echocardiographic investigation on the following day showed total resolution of left ventricular wall motion abnormalities. The diagnosis of mid-ventricular ballooning syndrome was made according to the findings of left ventriculography. In this case, the time course changes of both patient's pathophysiological condition and echocardiographic wall motion from the onset to recovery are rapid and uncommon.