远隔缺血预适应和后适应心肌保护作用比较
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远隔缺血预适应和后适应心肌保护作用比较
雒生杰
首都医科大学附属北京安贞医院 [摘要]背景 大约2/3以上的择期PCI术会造成心肌损伤,表现为肌钙蛋白升高。
肌钙蛋白升高原因包括手术过程中斑块受压造成粥样硬化物质碎片栓塞微循环、冠状动脉边支闭塞或缺血/再灌注损伤,造成心肌损伤或心肌梗死。
研究表明,经皮冠状动脉介入术相关的肌钙蛋白升高与后期心血管事件相关。
动物实验和少量临床研究报道,肢体缺血处理可以减轻预期的心肌损伤。
目的 通过在冠脉支架术围术期进行上肢短暂缺血处理,探讨在远离心脏的非致命器官缺血预适应或后适应,使心脏在冠状动脉介入治疗过程中得到保护的有效性和可行性。
[关键词]支架;心肌损伤;预适应;后适应
Remote Ischemic Pre—and post—conditioning Provides Similar Degree of Cardioprotection in Patients Undergoing Coronary Stent Implantation
[ Abstract ] Background Elective percutaneous coronary intervention ( PCI ) is associated with troponin release in more than two third of cases. Troponin release is a sensitive and specific marker of myocyte necrosis and infarction resulting from a form of ischemia/reperfusion injury,downstream embolization of atheromatous material, and coronary side —branch occlusion. A number of studies have demonstrated that procedure —related troponin release is associated with subsequent cardiovascular events. Many experiments and a few clinical trials have demonstrated that remote ischemic conditioning could reduce the injury.
Objectives to assess the effectiveness and applicability of cardioprotection of remote non —vital organ ischemia in patients undergoing selective coronary stents implantation by transiently blocking brachial blood stream.
[ Key words ] stent; myocardial injury; preconditioning; postconditioning。