Kajiya F, Hiramatsu O, Kimura A, Yamamoto T, Yada T, Ogasawara Y, Tsujioka K
Department of Medical Engineering and Systems Cardiology, Kawasaki Medical School, Okayama, Japan.
J Biomech Eng. 1992 Aug;114(3):385-90. doi: 10.1115/1.2891399.
Velocity profiles across a vessel were investigated in poststenotic regions of the canine left coronary artery by our 80-channel 20 MHz ultrasound velocimeter. The velocity waveform in a small artery just before its penetration into myocardium was measured by our laser Doppler method. The poststenotic velocity configuration was characterized by a narrow region of high velocity with diastolic reverse flow near the wall which may dissipate energy. The velocity waveform in the distal small arteries exhibited increased systolic reverse flow with decreased diastolic forward flow, resulting in a remarkable reduction of coronary inflow into the myocardium.
我们使用80通道20兆赫超声测速仪，对犬左冠状动脉狭窄后区域的血管速度剖面进行了研究。我们采用激光多普勒方法测量了一条小动脉在穿透心肌之前的速度波形。狭窄后速度形态的特征是，在靠近血管壁处有一个高速狭窄区域，伴有舒张期反流，这可能会消耗能量。远端小动脉的速度波形表现为收缩期反流增加，舒张期正向血流减少，导致进入心肌的冠状动脉血流量显著减少。
