二维斑点追踪技术评价正常成人左心室乳头肌收缩功能  

Evaluation on function of left ventricular papillary muscles in normal adults using two-dimensional speckle tracking imaging

作　　者：郭洁[1] 杨军[1] 白洋[1] 马春燕[1] 程艳彬[1] 

机构地区：[1]中国医科大学附属第一医院心血管超声科,辽宁沈阳110001

出　　处：《中国医学影像技术》2013年第4期532-535,共4页Chinese Journal of Medical Imaging Technology

基　　金：辽宁省自然科学基金(20092134)

摘　　要：目的应用二维斑点追踪成像(STI)评价正常成人左心室乳头肌的收缩功能。方法选取30名健康成年人,应用STI得到乳头肌及其基底部心室壁应变曲线,测量前外乳头肌纵向收缩峰值应变(ALP-LS)及应变达峰时间(ALP-Ts)、前外乳头肌基底部心室壁纵向收缩峰值应变(ALW-LS)及应变达峰时间(ALW-Ts)、后内乳头肌纵向收缩峰值应变(PMP-LS)及应变达峰时间(PMP-Ts)、后内乳头肌基底部心室壁纵向收缩峰值应变(IPW-LS)及应变达峰时间(IPW-Ts)。比较前外、后内乳头肌应变及各部位应变达峰时间的差异。结果30名受检者平均ALP-Ts为(451.23±44.03)ms,ALW-Ts为(364.53±48.13)ms,差异有统计学意义(t=13.059,P<0.001);平均PMP-Ts为(450.57±47.90)ms,IPW-Ts为(356.77±42.04)ms,差异有统计学意义(t=13.643,P<0.001);而ALP-Ts与PMP-Ts、ALP-LS与PMP-LS的差异均无统计学意义(P均>0.05)。结论正常成人左心室乳头肌的纵向收缩应变达峰时间延迟于相应乳头肌基底部室壁,前后两组乳头肌的收缩运动可能具有同步性。Objective To evaluate the function of left ventricular papillary muscles in normal adults using two-dimensional speckle tracking imaging （STD. Methods Thirty healthy subjects were enrolled, and the strain curves of left ventricular papillary muscles and corresponding walls were gained by STI. The longitudinal peak systolic strains of anterolateral papil- lary muscle （ALP-LS）, posteromedial papillary muscle （PMP-LS）, left ventricular anterolateral wall （ALW-LS） and left ventricular inferoposterior wall （IPW-LS） and the time （ALP-Ts, PMP-Ts, ALW-Ts, IPW-Ts） were measured by EchoPAC software, and then the differences of longitudinal peak systolic strains and time were compared. Results The ALP-Ts, ALW-Ts, PMP-Ts and IPW-Ts was （451.23 4- 44.03） ms, （364.53 --4- 48. 13） ms, （450.57 ~ 47.90） ms and （356.77! 42.04）ms, respectively. There were significant differences between ALP-Ts and ALW-Ts （t= 13. 059, P〈0. 001）, PMP-Ts and IPW-Ts （t=13. 643, P〈0. 001）, but the differences between ALP-Ts and PMP-Ts, ALP-LS and PMP-LS were not significant （both P〉0.05）. Conclusion The time of longitudinal peak systolic strain of papillary muscle lags is later than corresponding ventricular wall in healthy adult, and the anterolateral and posteromedial papillary muscles may be synchronized.

关 键 词：超声心动描记术 斑点追踪成像 乳头肌 应变 

分 类 号：R540.45[医药卫生—心血管疾病] R654.2[医药卫生—内科学]