Use of vasopressin after Caesarean section in idiopathic pulmonary arterial hypertension.
We report the successful use of vasopressin in the management of hypotension in association with severe right ventricular (RV) failure in two patients with advanced idiopathic pulmonary arterial hypertension. Both patients were pregnant and developed systemic hypotension after delivery by Caesarean section. Placental autotransfusion and possibly oxytocin use were thought to be the major contributing factors in worsening RV function. After the use of vasopressin in both patients, cardiovascular variables improved without untoward effect on RV function, and provided rescue therapy for systemic hypotension in this setting. Vasopressin, a direct vasopressor acting via V1 receptors on the vascular endothelium, has been shown to cause pulmonary vasodilatation experimentally and in animal models of pulmonary hypertension. Its synthetic analogue, terlipressin, has been shown to reduce pulmonary vascular resistance in humans with cirrhosis. Vasopressin may therefore have differential effects on the pulmonary and systemic circulations, allowing systemic pressure to be supported without detrimental effects on the pulmonary circulation.
Department of Respiratory Medicine and Pulmonary Hypertension Service, Hammersmith Hospital, Du Cane Road, London W12 0HS, UK. lauracprice@hotmail.com
L C
LC
Price
P
P
Forrest
V
V
Sodhi
D L
DL
Adamson
C
C
Nelson-Piercy
M
M
Lucey
L S
LS
Howard
D000328:Adult; D000773:Anesthesia, Obstetrical / Q000379:methods; D002585:Cesarean Section; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000150:complications*; D007022:Hypotension / Q000188:drug therapy* / Q000209:etiology; D011183:Postoperative Complications / Q000188:drug therapy; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular; D014662:Vasoconstrictor Agents / Q000627:therapeutic use*; D014667:Vasopressins / Q000627:therapeutic use*; D018497:Ventricular Dysfunction, Right / Q000150:complications
D014662:Vasoconstrictor Agents; D014667:Vasopressins