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《Journal of Tianjin Medical University》 2009-03
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Evaluation of systolic and diastolic ventricular synchronization in coronary heart disease patients with complete right bundle branch block by Doppler tissue velocity imaging

LI Xiu-yue,ZHOU Chang-yu,ZHENG Cheng-huan,FU Hua-ying (Department of cardiology,The Second Hospital,Tianjin Medical University,Tianjin 300211,China)  
Objective:To evaluate the ventricular synchronization of systolic and diastolic in coronary heart disease patients with the complete right bundle branch block (CRBBB) by Doppler tissue velocity imaging (TVI) technology.Methods:35 coronary heart disease patients with CRBBB were selected and compared with 31 controls with TVI.The parameters of myocardial imaging were evaluated.Time to peak velocity were measure at systolic and early diastolic phase (Ts and Te) in the base and interlude altogether 14 segments of left and right ventricular in all subjects.The average time of Ts in right ventricular 2 segments(Ts-2-RV),the average time of Ts and Te in left ventricular 12 segments (Ts-12-LV and Te-12LV),12 segments standard deviation (Ts-12-SD and Te-12-SD)and 12 segmental maximal Ts and Te difference (Ts-diff and Te-diff)were calculated.The left ventricular end systolic and diastolic diameter (LVEDs and LVEDd) and the volume (LVEVs and LVEVd)were measured.Results:(1) The 14 segments Ts of left and right ventricular in CRBBB were longer than those in control group (the base and interlude of interventricular septum were P0.05,and Other various segments were P0.01).Compares with the control group,the Ts-12-LV,Ts-12-SD and Ts-diff showed significant prolongation (P0.01).The Ts-2-RV was longer than the Ts-12-LV in CRBBB group(P0.05).(2) The time to peak velocity at early diastolic phase in 14 segments were failed to demonstrate any statistically significant differences(P0.05) between CRBBB group and control group,but the Te-12-SD and Te-diff in CRBBB were longer than those in control group (P 0.01).Conclusion:In coronary heart disease patients with CRBBB ventricular contraction is not synchronized,the interventricular systolic and diastolic are also asynchrony.
【CateGory Index】: R541.4;R541.7
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