[等长运动期间外周血流的血流描记术评估]

[Rheographic evaluation of peripheral blood flow during isometric exercise].

作者信息

Cifaldi S, Coviello M, Malvezzi A, Mascia F, Corsini G

出版信息

Boll Soc Ital Biol Sper. 1980 Feb 29;56(4):369-75.

Abstract

A rheographic evaluation of peripheral blood flow during isometric contraction (handgrip) has been done in 25 attendants of the Air Force Medical Service (mean age :20 years). The velocity of sphygmic wave, the sphygmic amplitude and, the peak time, heart rate and blood pressure have been measured at rest and during handgrip. The velocity of sphygmic wave does not change in all the subjects; the sphygmic amplitude is decreased of 10% (p less than .001), the peak time is decreased of 9% (p less than .001). Because sphygmic amplitude and peak time are directly proportional to flow volume, and their reduction significantly express a decrease of flow volume. The authors believe that the blood flow reduction is induced by the excitation of sympathetic peripheral alpha-receptors, not more balanced from sympathetic cholinergic vasodilator fibers. The actual result is an increase of the peripheral vascular resistances.

摘要

对25名空军医疗服务人员（平均年龄20岁）进行了等长收缩（握力）期间外周血流的血流图评估。在静息状态和握力期间测量了脉搏波速度、脉搏幅度、峰值时间、心率和血压。所有受试者的脉搏波速度均未改变；脉搏幅度降低了10%（p<0.001），峰值时间降低了9%（p<0.001）。由于脉搏幅度和峰值时间与血流量成正比，它们的降低显著表明血流量减少。作者认为，血流量减少是由交感神经外周α受体的兴奋引起的，而交感胆碱能血管舒张纤维的作用并不更平衡。实际结果是外周血管阻力增加。