Nagai H, Takata S, Sakagami S, Furusho H, Takamura M, Yuasa T, Kobayashi K
First Department of Internal Medicine, School of Medicine, Kanazawa University, Takara-machi, Japan.
J Am Soc Echocardiogr. 1999 Jul;12(7):582-9. doi: 10.1016/s0894-7317(99)70006-4.
The purpose of this study was to analyze the left ventricular contraction patterns in artificial preexcitation models by using 2-dimensional guided M-mode color tissue Doppler echocardiography. Three types of preexcitation models were produced in 12 patients by right atrio-mitral annular sequential pacing, carried out at the left ventricular lateral, posterior, and posteroseptal walls. Tissue Doppler M-mode was recorded at anteroseptal, posterior, lateral, and posteroseptal sites in the parasternal short-axis view. The time interval from the onset of the QRS complex during sinus rhythm or from the annular pacing spike during fusion beats to the beginning of systolic motion was measured. During sinus rhythm, the time interval at the anteroseptal wall was shortest. During fusion beats, the time intervals at the mitral annular pacing sites were shortest. In preexcitation models, tissue Doppler M-mode could clearly distinguish the difference of left ventricular contraction patterns and detect the earliest contraction site of the left ventricle.
本研究的目的是通过二维引导M型彩色组织多普勒超声心动图分析人工预激模型中的左心室收缩模式。通过在左心室侧壁、后壁和后间隔壁进行右心房-二尖瓣环顺序起搏，在12例患者中建立了三种类型的预激模型。在胸骨旁短轴视图的前间隔、后壁、侧壁和后间隔部位记录组织多普勒M型。测量窦性心律时QRS波群起始至收缩运动开始的时间间隔，或融合搏动时环起搏尖峰至收缩运动开始的时间间隔。在窦性心律期间，前间隔壁的时间间隔最短。在融合搏动期间，二尖瓣环起搏部位的时间间隔最短。在预激模型中，组织多普勒M型可以清晰地区分左心室收缩模式的差异，并检测到左心室最早的收缩部位。
