title: Comparison of effects of prostaglandin E1 and nitroprusside on pulmonary vascular resistance in children after open-heart surgery.
abstract: Prostaglandin E1 (PGE1) is a vasodilator. Because the drug is metabolized by lung, we postulated a selective effect on pulmonary vasculature. Twenty-six patients aged 3 months to 16 year (mean, 6.5 years) were studied after repair of atrial septal defect (5), ventricular septal defect (10), tetralogy of Fallot (3), and other lesions (8). Fourteen patients also received nitroprusside. PGE1 (0.1 to 1.0 micrograms/kg/min) or nitroprusside (0.59 to 8.7 micrograms/kg/min) was infused through a central venous catheter until mean pulmonary or mean systemic arteria pressure decreases at least 10%. Prostaglandin E1 and nitroprusside both decreased mean systemic arterial pressure and systemic vascular resistance (P less than 0.05). Although both drugs caused an average decrease in pulmonary arterial pressure and resistance, nitroprusside produced a more consistent response. Side-effects limited the use of PGE1 in 5 patients. PGE1 is an effective vasodilator and has advantages for some patients, but it does not produce selective vasodilation of pulmonary vessels.
mesh_terms: D000293:Adolescent; D000527:Alprostadil; D001794:Blood Pressure / Q000187:drug effects; D002302:Cardiac Output / Q000187:drug effects; D002648:Child; D002675:Child, Preschool; D005260:Female; D005292:Ferricyanides / Q000627:therapeutic use*; D006330:Heart Defects, Congenital / Q000601:surgery*; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007223:Infant; D008297:Male; D009599:Nitroprusside / Q000627:therapeutic use*; D011182:Postoperative Care; D011458:Prostaglandins E / Q000009:adverse effects / Q000627:therapeutic use*; D011651:Pulmonary Artery / Q000187:drug effects*; D011667:Pulmonary Veins / Q000187:drug effects*; D014655:Vascular Resistance / Q000187:drug effects*
chemical_list: D005292:Ferricyanides; D011458:Prostaglandins E; D009599:Nitroprusside; D000527:Alprostadil