DECONDITIONING-CVS EFFECTS

SUMMARY

1. Decreased stroke volume, reflex increase in HR.

2. Decreased blood volume, decrease exercise tolerance.

3. HR increases approximately 0.5 beats/minute/day, leading to immobilization tachycardia with minimal workload.

4. SV may decrease to 15% of normal within 2 weeks of bedrest as a result of blood volume changes and venous pooling occurs in the lower extremities.

5. Decreased maximal oxygen extraction (VO₂ max) occurs in 3-5 days post-immobilization.

6. Postural hypotension due to CVS effects and autonomic instability.

Reference(s)

Cifu, D.X. (2020). Braddom’s physical medicine and rehabilitation. Elsevier. Get it on Amazon.
Cuccurullo, S. (2019). Physical medicine and rehabilitation board review. New York: Demosmedical. Get it on Amazon.
O’Young, B., Young, M.A. and Stiens, S.A. (2008). Physical Medicine and Rehabilitation Secrets. Mosby. Get it on Amazon.