摘要
目的:研究缺血心肌等容收缩波(isovolumetriccontraction,IVC)幅度和时相的变化。方法:7只开胸犬,冠状动脉左旋支后壁分支结扎前、后分别录得左室后壁短轴方向等容收缩期组织多普勒(dopplertissueimaging,DTI)运动频谱,并进行结扎前后对照分析。结果:冠状动脉结扎前后比较,等容收缩波IVC1显著降低犤(17.31±2.88),(6.01±3.25)cm/s,t>5×106,P<0.05犦,持续时间显著缩短犤(31.77±14.69),(13.77±9.94)ms,t=3.01,P<0.05犦,IVC2波显著增高犤(-0.53±11.37),(-17.44±4.92)cm/s,t=3.36,P<0.05犦,持续时间显著延长犤(19.00±9.01),(59.09±11.99)ms,t=6.20,P<0.05犦。结论:心肌供血状态的改变可以引起等容收缩波显著变化。
AIM:To investigate the amplitude and phase of isovolumetric contraction(IVC)of ischemic myocardium. METHODS:Left ventricular(LV) wall IVC velocity patterns at the mid wall portion in the middle of the LV posterior wall in the short axis direction with Doppler tissue imaging(DTI) before and after artery deligation of seven open chest dogs were analyzed. RESULTS:After artery deligation,IVC1 was decreased significantly[(17.31±2.88),(6.01±3.25) cm/s,t >5×106,P< 0.05]and the time of IVC1 shortened significantly[(31.77±14.69),(13.77±9.94)ms,t=3.01,P< 0.05 ].The IVC2 was increased and the time of IVC2 was prolonged significantly[(-0.53±11.37),(-17.44±4.92)cm/s,(19.00±9.01),(59.09±11.99)ms,t=6.20,P< 0.05] respectively. CONCLUSION:Changes of myocardium blood can markedly alter IVC motion.
出处
《中国临床康复》
CSCD
2004年第18期3498-3499,共2页
Chinese Journal of Clinical Rehabilitation
