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目的：研究犬急性心肌梗塞（ＡＭＩ）时的左肾动脉（ＬＲＡ）和左颈总动脉（ＬＣＣＡ）的血流动力学变化。方法：用二维超声心动图及多普勒血流图（ＤＥ）检测冠脉支结扎前后ＬＲＡ、ＬＣＣＡ收缩期最大血流速度（Ｖｍａｘ）、时间速度积分（ＴＶＩ）、心率（ＨＲ）、阻力指数（ＲＩ）和搏动指数（ＰＩ）等。结果：心肌梗塞后ＬＲＡ、ＬＣＣＡ的ＲＩ、ＰＩ值显著升高（ＬＣＣＡＰ＜０．０１；ＬＲＡ，０．０５＞Ｐ＞０．０１），Ｖｍａｘ、ＴＶＩ、ＨＲ参数值有变化但无统计学差异。且心梗后３０和６０分钟时的参数值接近。结论：ＡＭＩ后ＬＲＡ、ＬＣＣＡ的血流阻力增加，搏动指数升高。ＤＥ对检测这些血流动力学变化具有较高的价值
Objective: To study the hemodynamic changes of left renal artery (LRA) and left common carotid artery (LCCA) in dogs with acute myocardial infarction (AMI). Methods: The maximal systolic velocity (Vmax), time velocity integral (TVI), heart rate (HR) and resistance of LRA and LCCA before and after coronary artery ligation were measured by two-dimensional echocardiography and Doppler flowgraphy (DE) Index (RI) and pulsatility index (PI) and so on. Results: The RI and PI of LRA and LCCA after myocardial infarction were significantly increased (LCCAP <0.01; LRA, 0.05> P> 0.01), Vmax, TVI and HR had no significant difference . And 30 and 60 minutes after myocardial infarction parameters close to. Conclusion: After AMI, the blood flow resistance of LRA and LCCA increased and the pulsatility index increased. DE is of high value for detecting these hemodynamic changes