Spinal cord injury (SCI) is associated with marked and rapid vascular adaptations
that negatively impact upon activities of daily living, for example, orthostatic tolerance,
heat stress and exercise performance, as well as cardiovascular health. Understanding
the vascular adaptations after SCI will help to understand the underlying mechanisms
for poor exercise tolerance and health in SCI. The onset of SCI is associated with
rapid arterial remodeling in both large and smaller arteries. In conduit and resistance
arteries, a rapid and strong inward remodeling is present, whilst results in impaired
vascular function after SCI. Studies performed after exercise training in able-bodied
individuals result in improved vascular function, largely through an increase in vasodilators.
In contrast, SCI is not associated with favorable changes in vasodilators, but rather
causes an increased role of vasoconstrictors in vascular function. Therefore, the
effects of deconditioning, e.g., SCI, on the vasculature are not simply the opposite
of those in response to exercise training. Moreover, exercise training in SCI is able
to reverse functional and structural remodeling, which suggests that vascular adaptations
in SCI are primarily caused by deconditioning.
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Publication history
Received:
May 15,
2013
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© 2013 Published by Elsevier Inc.