瞬时波强技术中R-W1时相分析

目的 通过R-W1时相分析,期望有助于该项瞬时波强(wave intensity,W1)技术的临床推广应用.方法应用Aloka Prosound α10彩色多普勒超声诊断仪对66例健康人R-W1时相进行检测.结果左右颈总动脉、右肱动脉的R-W1时间之间的差异均具有统计学意义(P＜0.01);左右颈总动脉压力波传导时间比较差异有统计学意义(P＜0.05);右肱动脉压力波传导时间与左右颈总动脉比较差异具有统计学意义(P＜0.01);左右颈总动脉W1起点一顶点时间差异无统计学意义;右肱动脉与左右颈总动脉W1起点-顶点时间比较差异有统计学意义(P＜0.05).结论文献报道的"R-W1约等于射血前期"实际上包含了三个时间段,分别为左室等容收缩期时间、压力波传导时间和W1起点-顶点时间.临床上用R-W1判断病变时需要考虑压力波传导时间的因素.射血前期应该是心电图上R波顶点到W1起点的时间,而不应包含W1起点到顶点的时间.

Phase analysis of R-W1 in wave intensity technique

Objective To explore the generalization and application of R-W1 through the phase analysis of Wave intensity technique.Methods The phases of R-W1 of 66 healthy adults were detected by Aloka Prosound α10 color Doppler uhrasound.Results There were all statistical significances in the time difference of R-W1 in left and right common carotid arteries and right brachial artery(P＜0.01),in the pressure wave conductive time in left and right common carotid arteries(P＜0.05),in right brachial artery and both sides of common carotid arteries(P＜0.01).There were no statistical significances in the time from the starting point to the culminate point of W1 in left and right common carotid arteries.There were statistical significances in the time from the starting point to the culminate point of W1 in right brachial artery and both sides of common carotid arteries(P＜0.05).Conclusions"R-W1 almost equals to pre-ejection period"as reported by literatures actually involves three phases which respectively are isovolumetric contraction time of left ventricle,pressure wave conductive time and time from the starting point to the culminate point of W1.The factor of pressure wave conductive time should be considered when evaluating diseases in clinic.The pre-ejection time should be the time from the culminate point of R wave in ECG to the starting point of W1 and the time from the starting point to the culminate point of W1 should not be involved in.