静息及等长握力运动时心房起搏对健康年轻男性的循环系统影响
Circulatory effects in healthy young men of atrial pacing at rest and during isometric handgrip.
作者信息
Bergenwald L, Eklund B, Freyschuss U
出版信息
J Physiol. 1981 Sep;318:445-53. doi: 10.1113/jphysiol.1981.sp013877.
Abstract
- The influence of a fixed heart rate and cardiac output on the cardiovascular response to isometric handgrip at one third of maximal voluntary contraction has been studied by means of atrial pacing. 2. At rest, atrial pacing with a mean heart rate of 109 beats/min increased cardiac output and forearm blood flow while total systemic and forearm vascular resistance decreased. 3. During handgrip, total systemic resistance increased both with and without pacing. A slow lowering of forearm vascular resistance was noted in the former situation, no change in the latter. 4. It is concluded that atrial pacing per se increases cardiac output in healthy, young volunteers. Handgrip elicits a vasoconstriction on other vascular beds than the resting forearm.
摘要
- 通过心房起搏研究了固定心率和心输出量对最大自主收缩三分之一时等长握力心血管反应的影响。2. 静息时，平均心率为109次/分钟的心房起搏增加了心输出量和前臂血流量，而总全身血管阻力和前臂血管阻力降低。3. 在握力过程中，无论是否起搏，总全身阻力均增加。在前一种情况下，前臂血管阻力缓慢降低，后一种情况无变化。4. 得出结论，心房起搏本身可增加健康年轻志愿者的心输出量。握力会引起除静息前臂外其他血管床的血管收缩。
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