微循环灌注障碍对急性心肌梗死患者心功能和收缩同步性的影响
摘要
目的应用心肌灌注分级(MBG)的方法判断急性心肌梗死(AMI)患者行直接经皮冠状动脉介入治疗(PCI)后的微循环灌注情况,并评价其对局部、整体心功能和收缩同步性的影响。方法前壁AMI患者128例,于发病12h内行直接PCI,按MBG将患者分为微循环灌注障碍组(MBG0~1级,A组)和微循环灌注良好组(MBG2~3级,B组)。于直接PCI后行左室造影,测定心室容积、压力参数和室壁运动积分(WMS);AMI后1周和6个月时行平衡法核素心室造影,测定左室局部和整体收缩功能、舒张功能及收缩同步性参数,并记录主要心脏不良事件(MACE)的发生率。结果(1)AMI后6个月,A组左室收缩末期容积指数(LVESVI)、左室舒张末期容积指数(LVEDVI)、WMS和左室舒张末期压(LVEDP)均较B组增高(P〈0.05);而LVEF、高峰射血率和高峰充盈率均较B组降低(P〈0.05)。(2)AMI后6个月,A组左室局部射血分数(LrEF)2~LrEF8分别较B组降低19.43%、32.98%、34.55%、35.89%、28.78%、27.49%和21.77%(P〈0.05)。(3)相位分析显示A组左室收缩同步性参数PS和PSD高于B组。(4)在6个月随访期内,A组MACE发生率明显高于B组。结论经MBG判定的直接PCI后的微循环灌注障碍状态,可导致左室局部和整体收缩功能及收缩同步性降低,减弱心室射血的力学效应,促进心室重构,直接影响AMI患者的长期预后。
出处
《中国医师进修杂志(内科版)》
2008年第11期43-46,共4页
Chinese Journal of Postgraduates of Medicine
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