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  • Title: Effects of acute angiotensin converting enzyme inhibition on renal blood flow in patients with stable congestive heart failure.
    Author: Le Jemtel TH, Maskin CS, Chadwick B.
    Journal: Am J Med Sci; 1986 Sep; 292(3):123-7. PubMed ID: 3019136.
    Abstract:
    Renal blood flow was serially measured as the left renal vein blood flow using the continuous thermodilution technique during acute angiotensin converting enzyme inhibition in 20 patients with stable congestive heart failure. Eleven patients received captopril orally, and the remaining nine patients received enalaprilat intravenously. During the control period, left renal vein blood flow and cardiac output did not correlate closely (r = 0.57). Following administration of captopril or enalaprilat, stroke volume index increased from 20 +/- 7 to 25 +/- 8 ml/M2 (p less than 0.001), while pulmonary capillary wedge pressure decreased from 26 +/- 8 to 19 +/- 8 mm Hg (p less than 0.001). Left renal vein blood flow increased in all patients despite a consistent reduction in systemic arterial pressure. At peak effect, left renal vein blood flow increased from 295 +/- 86 to 443 +/- 122 ml/min (p less than 0.001), while mean systemic arterial pressure fell from 81 +/- 13 to 71 +/- 14 mm Hg (p less than 0.001). Thus, in patients with stable congestive heart failure, acute angiotensin converting enzyme inhibition, although decreasing substantially systemic arterial pressure, consistently enhances renal blood flow.
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