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  • Title: Effect of short-term administration of cromakalim on renal hemodynamics and eicosanoid excretion in essential hypertension.
    Author: Lebel M, Grose JH, Lacourcière Y.
    Journal: Am J Hypertens; 1991 Sep; 4(9):740-4. PubMed ID: 1834087.
    Abstract:
    Cromakalim, a novel potassium channel-activating drug, was administered for a 3-day period in eight untreated hospitalized patients with established hypertension. The fixed and single dose of 1.5 mg/day produced a significant reduction in systolic and diastolic blood pressure with a small increase in heart rate. Glomerular filtration rate was unchanged and effective renal plasma flow was slightly increased with a concomitant small decrease in filtration fraction and in renal vascular resistance. No significant change was observed in urinary prostaglandin (PG)E2, PGF2 alpha, and thromboxane B2, while 6-keto-PGF1 alpha (the stable metabolite of prostacyclin) rose from 189 +/- 6 to 368 +/- 115 ng/day. The renal excretion of 6-keto-PGF1 alpha correlates with the modification observed in renal plasma flow, suggesting a compensatory role for prostacylin in preserving renal hemodynamics during antihypertensive therapy with cromakalim.
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