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本工作对高心率动物——家兔进行了心脏效应在颈动脉窦压力感受器反射中的作用的研究。一、阻断总颈动脉血流以减少颈动脉窦压力感受器的刺激而引起的加压反射,主要系血管效应。反射性血压升高并不伴有心率明显增加,而伴有心率明显增加者对血压水平的升高无明显影响。二、压迫颈动脉窦所引起的减压反射,表现为心脏血管混合效应,但以血管效应为主。如伴有心脏效应时则减压效应更为明显。三、排除迷走神经对心脏的控制后,颈动脉窦加压反射仍然发生,血压上升、心率无明显变化。颈动脉窦减压反射中,心脏效应仍可发生,血压呈双相变化,升高或降低。上述情况可能系生理状态下高心率动物的特点。
In this study, we studied the effect of heart effect on carotid sinus baroreceptor reflex in high-heart rate animal-rabbit. First, block the total carotid artery blood flow to reduce the stimulation of carotid baroreceptor pressure reflex, mainly vascular effect. Reflected high blood pressure is not accompanied by a significant increase in heart rate, while with a significant increase in heart rate had no significant effect on blood pressure levels. Second, oppression of the carotid sinus caused by decompression reflex, manifested as cardiovascular mixed effect, but the main vascular effects. If accompanied by heart effect decompression effect is more obvious. Third, to exclude the vagus nerve control of the heart, carotid sinus pressure reflex still occurs, blood pressure, heart rate no significant change. Carotid sinus decompression reflex, the heart effect can still occur, biphasic blood pressure changes, increased or decreased. The above situation may be the physiological characteristics of high-heart rate animals.