Nakatani Satoshi
Department of Cardiology, National Cardiovascular Center.
Nihon Rinsho. 2006 May;64(5):867-73.
Advancement of echocardiography has been remarkable recently and has been useful to diagnose and manage chronic heart failure. Tissue Doppler echocardiography can measure myocardial motion velocity thereby enabling us to assess global and regional myocardial function. Mitral annular velocity in early diastole has been reported to correlate with left ventricular diastolic relaxation. The ratio of pulsed Doppler mitral flow velocity to the mitral annular velocity in early diastole is used to assess pulmonary capillary wedge pressure or left ventricular end-diastolic pressure. Comparison of time to peak of myocardial systolic velocity among various segments provides us important information on ventricular dyssynchrony, which is crucial for the success of cardiac resynchronization therapy. Finally, real-time three-dimensional echocardiography has emerged as a new modality to assess cardiac anatomical abnormalities. It is also promising to measure ventricular volume accurately.
近年来，超声心动图技术取得了显著进展，对慢性心力衰竭的诊断和管理很有帮助。组织多普勒超声心动图可以测量心肌运动速度，从而使我们能够评估整体和局部心肌功能。据报道，舒张早期二尖瓣环速度与左心室舒张松弛相关。舒张早期脉冲多普勒二尖瓣血流速度与二尖瓣环速度之比用于评估肺毛细血管楔压或左心室舒张末期压力。比较不同节段心肌收缩速度达到峰值的时间，可为我们提供有关心室不同步的重要信息，这对心脏再同步治疗的成功至关重要。最后，实时三维超声心动图已成为评估心脏解剖异常的一种新方法。它在准确测量心室容积方面也很有前景。
