INTRACARDIAC ASSESSMENT AND UTILITY OF NEW ULTRASONIC TECHNOLOGIES

多普勒超声新模式的发展 信号方法的技术和新发展 对接收到的超声波光谱进行电子处理 心内血流速度的准确评估。 彩色编码，二维多普勒允许定性和 流场速度模式的定量评价， 湍流廓线的估计。 研究使用 这些技术包括：1）多普勒速度/流量 临床和临床前假体的体内和体外映射 二尖瓣; 2）比较体内多普勒超声与体内 体外多普勒超声和激光多普勒测速; 3）体内 假体流速和湍流分布的测定 瓣膜和体外观察结果的比较， 与剪应力相关，与临床事件相关; 4)二尖瓣返流的评估; B）二尖瓣返流的评估; 二尖瓣环成形术技术的有效性;和6）观察结果 在正常左心室舒张期速度/流量事件时， 更好地了解正常自体二尖瓣血流动力学 physiology.

The development of new modes of Doppler ultrasound technologies and new developments in the methods of signal electronic processing of the received ultrasonic spectra permit accurate assessments of velocities of intracardiac blood flow. Color-encoded, two-dimensional Doppler permits qualitative and quantitative evaluations of flow field velocity patterns and estimates of turbulence profiles. Studies performed utilizing these technologies include the following: 1) Doppler velocity/flow mapping in vivo and in vitro of clinical and preclinical prosthetic mitral valves; 2) comparison of in vivo Doppler ultrasound with in vitro Doppler ultrasound and laser Doppler anemometry; 3) in vivo determinations of velocity, flow turbulence profiles of prosthetic valves and comparisons made to in vitro observations as they relate to shear stresses, making correlations with clinical events; 4) assessments of mitral regurgitation; b) evaluation of the efficacy of mitral annuloplasty techniques; and 6) observations upon normal left ventricular diastolic velocity/flow events to better understand normal native mitral valve hemodynamic physiology.