CAJ | 학술논문

目的分析正常人及右室流出道(right ventricular outflow tract,RVOT)起源室性期前收缩(premature ventricular complexes,PVCs)患者收缩期应变达峰时间,探讨RVOT起源PVCs患者心肌收缩同步性及时序规律.方法应用斑点追踪成像(speckle tracking imaging,STI)技术测量30例RVOT起源PVCs患者在窦性心搏、室性心搏时及30例正常人纵向(TsL)、环周(TsC)、径向(TsR)收缩期应变达峰时间,分别计算标准差,并分析室性心搏时各方向应变达峰时间时序分布规律.结果与正常对照组比较,RVOT起源PVCs患者在室性心搏时TsL、TsC、TsR标准差均增大,窦性心搏时TsC、TsR标准差增大.室性心搏时,TsL、TsR从心尖至基底的不同层面间差异显著;TsL、TsC在不同室壁间差异显著.结论 RVOT起源PVCs患者在窦性心搏及室性心搏时均存在失同步状态,其中室性心搏时各方向应变达峰时间时序分布存在规律.
목적 분석정상인급우실류출도(right ventricular outflow tract,RVOT)기원실성기전수축(premature ventricular complexes,PVCs)환자수축기응변체봉시간,탐토RVOT기원PVCs환자심기수축동보성급시서규률.방법 응용반점추종성상(speckle tracking imaging,STI)기술측량30례RVOT기원PVCs환자재두성심박、실성심박시급30례정상인종향(TsL)、배주(TsC)、경향(TsR)수축기응변체봉시간,분별계산표준차,병분석실성심박시각방향응변체봉시간시서분포규률.결과 여정상대조조비교,RVOT기원PVCs환자재실성심박시TsL、TsC、TsR표준차균증대,두성심박시TsC、TsR표준차증대.실성심박시,TsL、TsR종심첨지기저적불동층면간차이현저;TsL、TsC재불동실벽간차이현저.결론 RVOT기원PVCs환자재두성심박급실성심박시균존재실동보상태,기중실성심박시각방향응변체봉시간시서분포존재규률.
Objective To evaluate left ventricular(LV) systolic synchrony and sequence in patients with premature ventricular complexes(PVCs) from right ventricular outflow tract (RVOT).Methods Thirty patients with frequent isolated PVCs from RVOT and 30 healthy subjects as control were included.Speckle tracking imaging (STI) was performed to assess the time-to-peak segmental systolic strain in longit udinal(TsL), circumferential (TsC) and radial (TsR) direction.The standard deviation (SD) of TsL,TsC and TsR of 18 LV segments were calculated respectively.All values of patients with PVCs were recorded during sinus beats(PVC-S) and PVC beats(PVC-V) respectively.LV systolic sequence in PVC-V was analyzed.Results Significant differences were observed in the SD values between the PVC-V and control subjects in three directions,as well as between the PVC-S and control subjects in circumferential and radial direction.In PVC-V significance difference was seen in TsL and TsR from apical to basal level,as well as in TsL and TsC in different walls.Conclusions LV systolic synchrony was demonstrated in patients with PVCs from RVOT during both sinus beats and PVC beats.Systolic sequence in PVC beats from RVOT exhibit certain rules.