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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.
Insights
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.
Abstract:
A post hoc analysis was performed on concentration response curves to sumatriptan in 62 human isolated coronary arteries. We determined whether donor-related clinical characteristics (age, sex, cause of death) and properties of the coronary artery (functional endothelial integrity, muscle mass) were related to the potency and efficacy of sumatriptan in contracting the human isolated coronary artery. The efficacy of sumatriptan was inversely related to the functional integrity of the vessel endothelium. Thus, contrary to expectation, coronary artery constriction to sumatriptan seems to be more pronounced in patients with nondiseased coronary arteries where the endothelium is intact. Nevertheless, in view of the high coronary reserve in these patients, myocardial ischemia after the use of sumatriptan is unlikely to occur, whereas in patients with coronary artery disease even a small contraction may be deleterious.