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Reversible impairment of forearm vasodilation after forearm casting
1Division of Cardiology, Milton S. Hershey Medical Center, Pennsylvania State University, Hershey 17033.
Summary
Resuming physical activity after forearm immobilization improves blood vessel dilation. Immobilization reduces forearm vasodilator capacity, but normal activity reverses this effect.
Area of Science:
- Physiology
- Vascular Biology
- Sports Medicine
Background:
- Forearm immobilization due to fractures can impact vascular function.
- The effects of immobilization on vasodilation require further investigation.
Purpose of the Study:
- To determine if normal physical activity reverses impaired vasodilation after forearm immobilization.
- To assess changes in minimal vascular resistance post-immobilization.
Main Methods:
- Six subjects with forearm casts were studied.
- Minimal vascular resistance was measured in both casted and noncasted forearms before and after cast removal.
- Measurements were taken within 48 hours and approximately 29 days after cast removal.
Main Results:
- Minimal vascular resistance significantly decreased in the immobilized (casted) forearm post-activity.
- No significant changes were observed in the noncasted (control) forearm.
- Maximal vasodilation improved with the resumption of physical activity.
Conclusions:
- Forearm immobilization is associated with reduced vasodilator capacity.
- Resumption of normal physical activity can restore vascular function and improve vasodilation.