Pulmonary vascular response to prostacyclin in fetal lambs

Robert Green, Jorge Rojas, Hakan Sundell

Research output: Contribution to journalArticlepeer-review


Eighteen prostacyclin injections (19.4±1.5 μg/kg) were performed in five chronically instrumented, intact fetal lambs in order to study the effects on pulmonary blood flow. These resulted in a brief period of bradycardia followed by a more prolonged period of increased pulmonary blood flow. In this latter phase, pulmonary blood flow increased from a baseline value of 49±4 ml/(kg min) to 122±10 ml/(kg min). Systolic/diastolic pulmonary arterial pressure simultaneously fell from 73±2 48±1 to 68±2 42±1 mm Hg. Flow through the ductus arteriosus was unchanged and right ventricular output increased to account for the increased pulmonary blood flow. Thus, prostacyclin causes pulmonary vasodilation in intact fetal lambs and may participate in the control of fetal pulmonary blood flow and the circulatory adjustments to extra-uterine life.

Original languageEnglish
Pages (from-to)927-934
Number of pages8
Issue number6
StatePublished - Dec 1979
Externally publishedYes


Dive into the research topics of 'Pulmonary vascular response to prostacyclin in fetal lambs'. Together they form a unique fingerprint.

Cite this