Department of Cardiothoracic Surgery, The Prince Charles Hospital, Australia; The University of Queensland, Australia.
Department of Cardiothoracic Surgery, The Prince Charles Hospital, Australia.
Heart Lung Circ. 2014 Jan;23(1):e16-9. doi: 10.1016/j.hlc.2013.07.005. Epub 2013 Aug 13.
Papillary muscle rupture is now a rare complication of acute myocardial infarction. Posteromedial papillary muscle rupture is more common than anterolateral papillary muscle rupture. The posteromedial papillary muscle is usually supplied from a branch of the right coronary artery. We present a case of posteromedial papillary muscle rupture due to an isolated left anterior descending artery lesion. This was diagnosed on the fifth day post infarction. The patient progressed to mitral valve replacement and coronary artery bypass grafting to the left anterior descending artery. We believe this unusual arterial supply to the posteromedial papillary muscle is due to an apex forming left anterior descending artery coupled with an apically located posteromedial papillary muscle.
乳头肌断裂现在是急性心肌梗死的罕见并发症。后内侧乳头肌断裂比前外侧乳头肌断裂更为常见。后内侧乳头肌通常由右冠状动脉的一个分支供应。我们报告了一例由于孤立的左前降支病变导致的后内侧乳头肌破裂的病例。这是在梗塞后第五天诊断出来的。患者进展为二尖瓣置换术和前降支冠状动脉旁路移植术。我们认为这种后内侧乳头肌的不寻常动脉供应是由于形成左前降支的尖端与位于顶点的后内侧乳头肌相结合所致。
