EFFECT OF HEAD-DOWN TILT ON CARDIOVASCULAR CONTROL IN HEALTHY-SUBJECTS - A SPECTRAL ANALYTIC APPROACH
EFFECT OF HEAD-DOWN TILT ON CARDIOVASCULAR CONTROL IN HEALTHY-SUBJECTS - A SPECTRAL ANALYTIC APPROACH
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DOI：
10.1042/cs0880087
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发表时间：
1995-01-01
期刊：
影响因子：
6
通讯作者：
ELGHOZI, JL
中科院分区：
文献类型：
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作者：
WEISE, F;LONDON, GM;ELGHOZI, JL
1.本研究的目的是非侵入性地确定在正常受试者中观察到的100度头低位急性心肺血容量扩张的自主心血管控制的变化。采用功率谱分析方法研究了12名健康男性头低位倾斜时手指血压和心率波动的影响.在低频（60-140 mHz，10-s节律）和高频（平均呼吸率+/- 50 mHz时的曲线下面积）分量上估计心率和血压节律性的幅度谱，计算收缩压和心率之间的传递增益和相位，估计前臂血管阻力以验证头朝下的程序。3.前臂血管阻力由19.82（16.34-26.46）mmHg ml（-1）min 100 ml降至18.05（13.69-22.88）mmHg ml（-1）min 100 ml（P
1. The purpose of this investigation was to determine non-invasively the changes in autonomic cardiavascular control observed in normal subjects submitted to acute cardiopulmonary blood volume expansion by 100 degrees head-down tilt. The effect of head-down tilt on finger blood pressure and heart rate fluctuations was studied by means of power spectral analysis in 12 healthy men.2. Amplitude spectra of heart rate and blood pressure rhythmicity were estimated at the low-frequency (60-140 mHz, 10-s rhythm) and high-frequency (area under the curve at mean respiration rate +/- 50 mHz) component, Transfer gain and phase were calculated between systolic blood pressure and heart rate, Forearm vascular resistance was estimated to validate the head-down procedure.3. Forearm vascular resistance decreased significantly from 19.82 (16.34-26.46) mmHg ml(-1) min 100 ml to 18.05 (13.69-22.88) mmHg ml(-1) min 100 ml (P