title: [The role of the venous reservoir in maintaining arterial pressure during hemodialysis. Effect of dihydroergotamine].
abstract: Hemodialysis has been reported to produce a decrease in cardiac output partially related to a peripheral relocation of blood volume. In order to further evaluate this hypothesis, the hemodynamic effects of dihydroergotamine (DHE), a veino-constrictor drug, were investigated in 5 patients undergoing hemodialysis. Body weight, total blood volume, arterial blood pressure, cardiac output and heart rate were obtained before (period A) and immediately after hemodialysis: before (period B) and after an acute infusion of DHE (period C); studies were performed in supine then in tilted position. During period B, cardiac index decreased by 27% (p less than 0.05) and stroke index by 35% (p less than 0.02). Acute infusion of DHE produced a significant increase in cardiac index (+ 18%, p less than 0.05), stroke index (+ 28%, p less than 0.05) and blood pressure (+ 20%, p less than 0.05). These results indicate that the hemodynamic alterations induced by hemodialysis may be partially reversed by contraction of the capacitance system following DHE infusion.
mesh_terms: D000328:Adult; D000368:Aged; D004087:Dihydroergotamine / Q000627:therapeutic use*; D005260:Female; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D007022:Hypotension / Q000209:etiology / Q000517:prevention & control*; D007676:Kidney Failure, Chronic / Q000628:therapy; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis / Q000009:adverse effects*; D014680:Veins / Q000187:drug effects*
chemical_list: D004087:Dihydroergotamine
vernacular_title: Rôle du réservoir veineux dans le maintien de la pression artérielle au cours de l'hémodialyse. Action de la dihydroergotamine.