二维斑点追踪显像技术评价慢性缺血性二尖瓣返流患者乳头肌功能的超声研究  

Evaluation of Papillary Muscle Function of Patients with Chronic Ischemic Mitral Regurgitation using Two-dimensional Speckle Tracking Imaging

作　　者：黄栎为[1] 张炬倩[1] 李晨[1] 胥建君[1] 李娅姣[1] 饶莉[1] 

机构地区：[1]四川大学华西医院心内科,成都610041

出　　处：《四川大学学报（医学版）》2012年第2期271-274,共4页Journal of Sichuan University(Medical Sciences)

基　　金：四川省科技支撑计划(2009SZ0134);成都市科技计划项目(10GGYB076SF-023)资助

摘　　要：目的本研究应用二维斑点追踪显像技术测量慢性缺血性二尖瓣返流(IMR)患者乳头肌收缩运动的二维应变及应变率,以探讨此技术对评价慢性IMR患者乳头肌功能的临床应用价值。方法纳入陈旧性心肌梗死且合并二尖瓣返流的患者119例,正常对照组94例。测量左室两组乳头肌的收缩期峰值应变(PSS)和应变率(PSSR)。根据病例组患者心肌梗死部位不同又分为前壁(AMI)和下壁(IMI)心肌梗死两个亚组,比较不同亚组上述参数间的差异以及与二尖瓣返流程度的关系。结果慢性IMR组的两组乳头肌PSS、PSSR均较正常对照组降低;IMI组前、后乳头肌的PSS、PSSR均较AMI组低;IMI组的二尖瓣返流以中、重度为主,而AMI组则以轻、中度为主。结论二维斑点追踪显像技术可较准确评价慢性IMR患者乳头肌的运动功能,为进一步的临床研究提供了无创、可信赖的新方法。Objective To evaluate the papillary muscle function of patients with chronic ischemic mitral regurgitation（IMR） using two-dimensional speckle tracking imaging.Methods 119 patients with chronic IMR and 94 normal controls were enrolled in this study.The peak systolic strain（PSS） and peak systolic strain rate（PSSR）of the papillary muscle were assessed with two-dimensional strain software.The PSS and PSSR were compared between the patients with anterior myocardial infarct（AMI） and those with inferior myocardial infarct（IMI）.The correlation between the degree of IMR and the position of MI was analysed.Results The patients with chronic IMR had significantly lower PSS and PSSR than the normal controls.The IMI patients had significantly lower PSS and PSSR than the AMI patients.The IMI patients had significantly higher degree of MR than the AMI patients.Conclusion Two-dimensional speckle tracking imaging is a reliable method for assessing papillary muscle function.

关 键 词：超声心动图 缺血性二尖瓣返流 乳头肌 应变 

分 类 号：R542.51[医药卫生—心血管疾病]