摘要
目的观察慢性心力衰竭(CHF)患者在等容舒张期出现的左心室壁收缩后收缩(PSS)现象及其临床意义。方法利用组织速度成像技术(TVI)检测60例CHF患者及对照组30名正常人的心肌运动,应用QLAB分析软件测量左心室各壁基底段和中段心肌收缩期峰值速度(Vs)、持续时间(Ts)及PSS峰值速度(Vpss)、持续时间(Tpss)。结果CHF组基底段和中间段在等容舒张期PSS的发生率均为34.44%,其中病理性PSS的发生率分别为29.44%、29.72%。对照组基底段和中间段在等容舒张期PSS的发生率分别为26.11%、20.56%,未发生病理性PSS。与对照组的生理性PSS相比,CHF组的病理性PSS峰值速度增高、持续时间延长(P<0.05)。结论CHF患者的病理性PSS峰值速度高、持续时间长,可能是导致CHF患者左心室不同步运动的原因之一。
Objective To observe the post-systolic shortening （PSS） during isovolumic relaxation phase and its clinical significance in regional myocardium in chronic heart failure （CHF） patients. Methods Left ventricular regional myocardium movement in 60 CHF patients （CHF group） and 30 healthy volunteers （control group） were assessed with tissue velocity imaging （TVI）. QLAB software was used to measure the systolic peak velocity （Vs）, regional systolic time （Ts）, post-systolic shortening velocity （Vo,s） and post-systolic shortening time （Tpss） at the basal and middle levels of left ventricle. Results In CHF patients, the rate of isovolumic relaxation phase PSS was 34.44% both in basal and mid segments, the rate of pathological PSS was 29.44% and 29.72%, respectively. The rate of isovolumic relaxation phase PSS in control group was 26.11% and 20. 56 %, respectively; none pathological PPS occured. Compared with the physiological PSS of control group, the pathological PSS of CHF group had a higher peak velocity and a longer time （P〈0.05）. Conclusion The pathological PSS of CHF patients has high peak velocity and long duration, which may be one of the causes leading to the asynchronous movement of left ventricle in CHF.
出处
《中国医学影像技术》
CSCD
北大核心
2009年第10期1793-1796,共4页
Chinese Journal of Medical Imaging Technology
关键词
组织速度成像
心力衰竭
收缩后收缩
Tissue velocity image
Heart failure
Post-systolic shortening
