二叶式主动脉瓣患者左心室心肌应变参数磁共振定量研究

Journal of Cardiovascular and Pulmonary Diseases(2022)

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Abstract
目的:探讨二叶式主动脉瓣(BAV)患者左心室心肌应变的磁共振定量特征,为临床提供更多手术预后预测参考信息.方法:回顾性分析2015年12月至2021年4月在北京安贞医院行CMR检查的BAV患者作为病例组(BAV组),另选取同期无心血管疾病且CMR无异常表现的人群作为对照组.采用心脏磁共振组织追踪(CMR-TT)技术测量左心室心肌应变参数,包括整体径向应变峰值(GPRS)、周向应变峰值(GPCS)、纵向应变峰值(GPLS)和扭转力(Torsion).根据主动脉瓣狭窄程度将BAV组分成无或轻度狭窄组,中或重度狭窄组.比较BAV组与对照组的差异,并分析与应变参数间的相关性.结果:与对照组比较,BAV组患者GPRS、GPCS、GPLS、Torsion均较低(P均<0.01),其中中或重度主动脉瓣狭窄组GPRS、GPCS、GPLS较无或轻度主动脉瓣狭窄组均减低(P均<0.01),而左心室Torsion差异无统计学意义(P=0.23).相关分析结果显示,GPRS、GPCS、GPLS值与BAV患者的LVEF值呈正相关(r分别为0.907、0.784和0.745,P均<0.0001),而与主动脉瓣狭窄程度呈负相关(r分别为-0.618、-0.602和-0.505,P均<0.01).Torsion与BAV患者的LVEF值呈正相关(r=0.483,P<0.05),与V/M呈负相关(r=-0.431,P<0.05).结论:BAV患者瓣膜功能障碍会导致左心室心肌应变的改变;多参数CMR定量评估有助于BAV患者心脏功能障碍风险分层.
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