Related Experiment Videos
High altitude-related neurocardiogenic syncope
J Freitas1, O Costa, M J Carvalho
1Centro de Estudos da Função Autonómica, Oporto, Portugal.
The American Journal of Cardiology
|May 1, 1996
Abstract:
This report presents a well-documented link between vasodepressor syncope, a marked increase of LF/HF ratio response to orthostasis (sympathetic dominance), and the efficacy of beta blockers in preventing orthostatic symptoms and absence of tilt-induced syncope, with normalization of the LF/HF ratio response.