Bradykinin and forearm blood flow

Cardiopulmonary bypass and forearm blood flow.

STUDY OBJECTIVE To assess the effect of cardiopulmonary bypass (CPB) on muscle blood flow (MBF) when measured in the forearm by venous occlusion plethysmography. DESIGN This was a prospective study. SETTING Operating room area of a tertiary care university medical center. PARTICIPANTS Twenty-seven patients (25 men and 2 women), aged 62 +/- 1.5 years, undergoing elective coronary bypass gr...

Bradykinin, digital blood flow, and the arteriovenous anastomoses.

• During studies on the anticoagulating properties of snake venom, Rocha e Silva and associates discovered the vasoactive polypeptide, bradykinin. The substance was called bradykinin because, in contrast to histamine and acetylcholine, it stimulated smooth muscle to contract after a latent period and because the contraction was gradual. The substance received little attention until recently whe...

Forearm blood flow during and after isometric hand-grip contractions.

1. A method is described for the measurement of forearm blood flow during sustained voluntary isometric hand-grip contractions that can be maintained constant by the subject’s monitoring of the strength of his contractions. 2. In most subjects it was found that contractions of 5% of their maximal voluntary force could be maintained without fatigue, and without any post-exercise increase in bloo...

Upright posture reduces forearm blood flow early in exercise.

The hypothesis that upright posture could modulate forearm blood flow (FBF) early in exercise was tested in six subjects. Both single (2-s duration) and repeated (1-s work/2-s rest cadence for 12 contractions) handgrip contractions (12 kg) were performed in the supine and 70° head-up tilt (HUT) positions. The arm was maintained at heart level to diminish myogenic effects. Baseline brachial arte...

The habituation of forearm muscle blood flow in phobic subjects.