Anterior Papillary Muscle Rupture due to Acute Myocardial Microinfarction of the Small High Lateral Branch

Figure 1

Preoperative electrocardiogram reveals ST-segment elevation in leads I, aVL, and aVR (a). Preoperative chest radiographs reveal severe pulmonary congestion (b). Preoperative transesophageal echocardiography reveals severe mitral regurgitation due to papillary muscle rupture (c, d). The white arrow indicates the ruptured anterior papillary muscle.

(a)

(b)

(c)

(d)