【摘要】 目的：探讨高原人室性早搏对心脏排出和充盈的血液动力学文化的影响。方法：对35例室性早搏患者用脉冲多普勒心动图分别记录二尖瓣口及主动脉瓣口的血流频谱，同时用Ⅱ导联心电图在超声视屏上同步显示，分别测量室性早搏前正常心动周期二尖瓣口和主动脉瓣口流速积分（NMVI和NAVI），定性早搏时二尖瓣口和主动脉瓣口的流速积分（EMVI和EAVI），及代偿心搏（室性早搏后）二尖瓣口和主动脉瓣口的流速积分（PMVI和PAVI），室性早搏提前指数为T—R1／R－R。结果：EMVI和EAVI明显低于NMVI和NAVI，PMVI和PAVI显著高于NMVI和NAVI，但仅代偿47％和44％。室性早搏提前指数T－R1／R－R与室性早搏排血比值（EAVI／NAVI）及室性早搏充盈比值（EMVI／NMVI）呈良好相关。结论：定性早搏时心搏量和充盈量明显下降，室性早搏时的心搏量和充盈量的减少较平原人室早时为少，而室早后的代偿能力却较强，但过早的、过频的室早临床应予以重视。更多还原

【Abstract】 In order to further study the hemodynamics of Ventricular extrasysto1e (VS)on high al titude residents 35 subject with Vs received the measure of pulsed Doppler at 2260m altitude. To assess transmitral flow and transaortic flow at apical 4 and 5 chamber view. NMVI and NAVI were measured be fore,after and during Vs respectively. The prematurity index is T-R1/R-R. The results showed that the EMVI and EAVI were significantly lower than NMVI and NAVI,re spectively. PMVI and PAVI were all significantly higher than NMVI and NAVI,but only compensated 47% and 44%,The prematurity index T - R1/R - R correlated well with EAVI/NAVI and EMVI/ NMVI. Conlusion: the AVI and MVI decrease significantly, during vs while the PAVI and PMVI in crease,but the compensation is not complete. The reduction of AVI and MVI of high altitude residents were lower than sea leve1 sebjects.更多还原