Title : Placental vascular responses to nicardipine in the hypertensive ewe.

Pub. Date : 1989 Oct

PMID : 2801820






4 Functional Relationships(s)
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1 Therefore nicardipine, a dihydropyridine calcium channel blocker, should modulate angiotensin II-induced vasoconstriction. Nicardipine angiotensinogen Homo sapiens
2 Nicardipine also reversed angiotensin II-induced vasoconstriction in the renal and endomyometrial vascular beds (p less than 0.05). Nicardipine angiotensinogen Homo sapiens
3 Unexpectedly, however, nicardipine worsened placental vasoconstriction caused by angiotensin II, as placental blood flow fell from 242 +/- 32 ml.min-1.kg-1 fetal weight to 128 +/- 7 ml.min-1.kg-1 fetal weight (p less than 0.05), and placental resistance increased from 0.48 +/- 0.04 mm Hg.ml-1.min.kg-1 fetal weight to 0.55 +/- 0.05 mm Hg.ml-1.min.kg-1 fetal weight (p less than 0.05). Nicardipine angiotensinogen Homo sapiens
4 Nicardipine reverses angiotensin II-induced vasoconstriction systemically and in the kidney and uterus of the pregnant ewe, but does not reverse placental vasoconstriction and may significantly alter fetal cardiorespiratory status. Nicardipine angiotensinogen Homo sapiens