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Human isolated coronary artery contraction to sumatriptan: a post hoc analysis
A Maassen VanDenBrink1, W A Bax, N N Ramrattan
1Department of Pharmacology, Erasmus University Medical Centre, Rotterdam, The Netherlands.
Cephalalgia : an International Journal of Headache
|October 19, 1999
Summary
Sumatriptan causes more coronary artery constriction in patients with healthy arteries than in those with disease. This finding is crucial for understanding sumatriptan
Area of Science:
- Pharmacology
- Cardiovascular Research
- Human Physiology
Background:
- Sumatriptan is a medication used for migraines.
- Its effects on human coronary arteries are not fully understood.
- Coronary artery function can be influenced by endothelial integrity.
Purpose of the Study:
- To investigate the relationship between donor clinical characteristics and coronary artery properties with sumatriptan's potency and efficacy.
- To analyze sumatriptan's concentration-response curves in isolated human coronary arteries.
Main Methods:
- Post hoc analysis of concentration-response curves.
- Utilized 62 human isolated coronary arteries.
- Assessed donor age, sex, cause of death, and coronary artery endothelial integrity and muscle mass.
Main Results:
- Sumatriptan's efficacy in constricting coronary arteries was inversely related to endothelial functional integrity.
- Greater constriction occurred in arteries with intact endothelium (non-diseased arteries).
- Less constriction was observed in arteries with compromised endothelium (diseased arteries).
Conclusions:
- Contrary to expectations, sumatriptan elicits a stronger constrictive response in healthy coronary arteries with intact endothelium.
- While myocardial ischemia is unlikely in patients with high coronary reserve and intact endothelium, even minor constriction can be detrimental in patients with coronary artery disease.