Why the study?
Does physiological baroreceptor unloading induced by 70 degrees head-up tilt affect low-frequency oscillations of RR-interval in tetraplegics compared to healthy subjects?
Population
9 complete, traumatic tetraplegics (C4-C7) and 10 normally healthy subjects
Comparison
Physiological baroreceptors unloading induced by… vs At rest
Design
Cross-sectional
Authors
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Absence of LF oscillations in tetraplegics supports sympathetic requirement for LF HRV; hypothesis-generating for baroreflex mechanisms in autonomic dysfunction.
Does physiological baroreceptor unloading induced by 70 degrees head-up tilt affect low-frequency oscillations of RR-interval in tetraplegics compared to healthy subjects?
Vagal activity changes from baroreflex stimulation alone are unlikely to generate low-frequency heart period oscillations without intact sympathetic control.
Iellamo et al. (2001) studied this question.
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