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采用 Ｆｉｎａｐｒｅｓ 无创性动脉血压监测仪记录连续逐跳血压信号， 将朝同一方向均增大或减小变化的连续三个心跳以上的收缩压值与相应下一次心跳的心跳间期值进行线性回归，求出有明显相关关系的回归线斜率值作为 １ 次自发性压力感受器－心率反射反应的斜率（ＢＲＳ）值。据此观察了＋ ６５°头高位倾斜（ＨＵＴ）与－ ６．６７ ｋＰａ 下体负压（ＬＢＮＰ）作用下，以及 １６ 天 － ６°头低位卧床期间６ ｍ ｉｎ 平均ＢＲＳ的变化。结果表明， 在上述三种条件下，尽管血压反应不相同，但平均自发性 ＢＲＳ值均显著减小（Ｐ＜ ０．０１，Ｐ＜ ０．０５）。故该方法可用于评定重力应激下压力感受器－心率反射反应性的变化
Using Finapres noninvasive arterial blood pressure monitor to record continuous beating blood pressure signal, the systolic blood pressure values of more than three consecutive beats that increase or decrease in the same direction are linearly regressed with the next beating heartbeat values, Obtain a significant correlation between the regression line slope value as a spontaneous baroreceptor - heart rate reflex response (BRS) value. The mean BRS changes at 6 mins between + 65 ° HUT and - 6.67 kPa LBNP and from 16 days to 6 ° low bed rest were observed. The results showed that under the three conditions mentioned above, mean spontaneous BRS decreased significantly (P <0.01, P <0.05), despite different blood pressure responses. The method can be used to assess changes in baroreceptor-heart rate reflex response to gravity stress