Blom Aaron S, Acker Michael A
University of Pennsylvania Medical Center, USA.
Curr Probl Cardiol. 2007 Oct;32(10):553-99. doi: 10.1016/j.cpcardiol.2007.08.001.
Cardiac failure remains the leading cause of death in the Western World today. After myocardial insult, as the heart remodels and dilates, an increase in wall tension occurs secondary to increased radius of curvature, leading to increased myocardial oxygen consumption, decreased subendocardial blood flow, impaired energetics, and increased arrhythmias. Poor prognosis directly correlates with the degree of remodeling. Despite improvements in left ventricular function and long-term outcomes seen with pharmacologic therapy, the results remain far from perfect and the mortality continues to be high. The surgical armamentarium for treating end-stage heart failure is broad and new types of surgical treatments continue to emerge as alternatives to cardiac transplantation for the treatment of end-stage heart failure. Furthermore, surgical therapies that were once contraindicated for use in the failing heart are now being used to halt or reverse ventricular remodeling and improve cardiac function. Therefore, an aggressive approach to surgical revascularization, correction of mitral insufficiency, surgical reversal of left ventricular remodeling, and long-term use of mechanical ventricular assistance should be considered in any heart failure patient who has exhausted pharmacologic therapy.
心力衰竭仍是当今西方世界的主要死因。心肌受损后,随着心脏重塑和扩张,由于曲率半径增加,壁张力会继发增加,导致心肌耗氧量增加、心内膜下血流减少、能量代谢受损以及心律失常增加。预后不良与重塑程度直接相关。尽管药物治疗使左心室功能和长期预后有所改善,但结果仍远非完美,死亡率仍然很高。治疗终末期心力衰竭的外科手段广泛,新型外科治疗方法不断涌现,作为心脏移植治疗终末期心力衰竭的替代方案。此外,曾经被认为不适用于衰竭心脏的外科治疗方法现在正被用于阻止或逆转心室重塑并改善心脏功能。因此,对于任何已用尽药物治疗的心力衰竭患者,都应考虑积极采取手术血运重建、纠正二尖瓣关闭不全、手术逆转左心室重塑以及长期使用机械心室辅助等方法。