JOURNAL ARTICLE
RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
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Acute vasoconstrictor response to intravenous furosemide in patients with chronic congestive heart failure. Activation of the neurohumoral axis.

Hemodynamic and neurohumoral responses to acute diuretic therapy were measured in 15 patients with severe chronic heart failure given intravenous furosemide, 1.3 +/- 0.6 (SD) mg/kg body weight. Left ventricular pump function deteriorated by 20 minutes, as indicated by a fall in stroke volume index (27 +/- 8 to 24 +/- 7 mL/min X m2 body surface area, p less than 0.01) and an increase in left ventricular filling pressure (28 +/- 7 to 33 +/- 9 mm Hg, p less than 0.01). Increases occurred in heart rate (87 +/- 13 to 91 +/- 16 beats/min, p less than 0.01), mean arterial pressure (90 +/- 15 to 96 +/- 15 mm Hg, p less than 0.01), systemic vascular resistance (1454 +/- 394 to 1676 +/- 415 dynes X s X cm-5, p less than 0.01), plasma renin activity (9.9 +/- 8.5 to 17.8 +/- 16 ng/mL X h, p less than 0.05), plasma norepinephrine level (667 +/- 390 to 839 +/- 368 pg/mL, p less than 0.01), and plasma arginine vasopressin level (6.2 +/- 1.3 to 8.3 +/- 2.0 pg/mL, p less than 0.01). During the next 3.5 hours the patients had diuresis (2085 +/- 1035 mL) and the expected fall in filling pressure (28 +/- 7 to 22 +/- 10 mm Hg, p less than 0.01). Neurohumoral indicators also returned toward the control levels. Intravenous furosemide, in patients with severe chronic heart failure, is associated with acute pump dysfunction temporally related to activation of the neurohumoral axis.

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