血压是由心脏泵血的能力(CO)和外周血管阻力(SVR)决定。平均血压(MAP)是估计心脏以外的脏器血液灌注的最有用的参数,而舒张压(DBP)是对冠状动脉的血液灌注可能更重要。
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外周血管阻力估测及其临床应用的商榷 外周血管阻力(peripheral vascular resistance,PVR)亦称为“外周阻力或血流阻力”,PVR是形成和影响动脉血压的重要因素。小动脉和微动脉是.
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炎症反应,其主要特点是严重的血管扩张。有的病人临床表现为 CPB中或 CPB后严重低血压,心动过速,外周血管阻力( systemic vascular resistance, SVR)降低,小动脉反应性差,需要大量的液体和缩血管药物来维持血液动力学稳定,而心输出量往往正常或偏高。
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心输出量和外周血管阻力的变化情况与血压改变相类似。
The changes of cardiac output and peripheral vascular resistance were similar to that of mean arterial pressure.
耐力训练导致耗氧量和清除量增加,心脏搏出量和输出量增加,外周血管阻力下降。
Endurance training results in an increase in oxygen consumption and delivery. Stroke volume and cardiac output increase. Peripheral vascular resistance decreases.
结论:丹参注射液具有一定的扩张外周血管,降低外周血管阻力,增加心肌收缩力,增加心输出量的作用。
Conclution: The functions of this medicine were expansion of periphery blood vessel and reduction its resistance, increase in myocardium contractive force and in cardiac out put.
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