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Case Reports
. 1993;83(1-2):121-3.
doi: 10.1159/000175957.

Postexercise syncope: evidence for increased activity of the sympathetic nervous system

M Arad  1 , A Solomon, A Roth, J Atsmon, B Rabinowitz
Affiliations
Case Reports

Postexercise syncope: evidence for increased activity of the sympathetic nervous system

M Arad et al. Cardiology. 1993.

Abstract

This report describes an association of postexertional syncope with increased levels of circulating catecholamines. A 36-year-old male who experienced postexercise bradycardia and asystole had higher basal plasma norepinephrine (120 versus 68 +/- 6 pg/ml) and epinephrine (18 versus less than 10 pg/ml) but a similar vagal tone (vagal tone index of 5.44 versus 5.81 +/- 1.00 U) when compared with 6 closely matched subjects who underwent an uneventful stress test.

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