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.
Original language | English |
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Pages (from-to) | 121-123 |
Number of pages | 3 |
Journal | Cardiology |
Volume | 83 |
Issue number | 1-2 |
DOIs | |
State | Published - 1993 |
Externally published | Yes |
Keywords
- Beta-blockers
- Epinephrine
- Plasma norepinephrine
- Postexercise syncope