The haemodynamic effects of subcutaneous sumatriptan, a 5HT1-receptor agonist.

Abstract:

AIMS:Previous in vivo studies with sumatriptan, a 5HT1-receptor agonist, have demonstrated vasopressor responses in the pulmonary and systemic arterial circulation. Pulmonary artery wedge pressure (PAWP) also increases after sumatriptan injection, raising the possibility of an additional venoconstrictive action or a negative inotropic effect. The mechanism for the rise in PAWP was investigated in the study. METHODS:Ten patients undergoing diagnostic coronary arteriography underwent haemodynamic monitoring. RESULTS:There was a significant rise (P < 0.05) in systemic and pulmonary arterial pressure and total systemic and pulmonary vascular resistance. There was a similar rise (P < 0.05) in PAWP and left ventricular end diastolic pressure (LVEDP). There was no change in cardiac output nor in peak rate of left ventricular pressure rise (dP/dt). CONCLUSIONS:The sumatriptan induced rise in PAWP and LVEDP appears consequent upon increased afterload although a negative inotropic effect cannot be excluded.

journal_name

Br J Clin Pharmacol

authors

Hood S,Birnie D,Hillis S

doi

10.1111/j.1365-2125.1997.00555.x

subject

Has Abstract

pub_date

1997-03-01 00:00:00

pages

327-8

issue

3

eissn

0306-5251

issn

1365-2125

journal_volume

43

pub_type

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