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  • Title: Effects of intravenous milrinone followed by titration of high-dose oral vasodilator therapy on clinical outcome and rehospitalization rates in patients with severe heart failure.
    Author: Cusick DA, Pfeifer PB, Quigg RJ.
    Journal: Am J Cardiol; 1998 Nov 01; 82(9):1060-5. PubMed ID: 9817482.
    Abstract:
    This study evaluated the efficacy of intravenous milrinone in improving hemodynamics and facilitating the titration of high-dose oral vasodilator therapy to improve clinical status. Fourteen patients (mean age 52 +/- 12 years) with severe heart failure and a left ventricular ejection fraction of 18 +/- 6% underwent right-side heart catheterization and an intravenous milrinone infusion followed by titration of oral vasodilator and diuretic therapy. Milrinone significantly (p <0.05) improved right atrial pressure (12 +/- 5 to 8 +/- 5 mm Hg), pulmonary capillary wedge pressure (23 +/- 7 to 15 +/- 7 mm Hg), cardiac index (1.9 +/- 0.4 to 3.4 +/- 0.5 L/min/m2), systemic vascular resistance (1,809 +/- 526 to 891 +/- 144 dynes/s/cm(-5)), and pulmonary vascular resistance (285 +/- 151 to 163 +/- 68 dynes/s/cm(-5)), which was maintained in 10 patients with titration of high-dose oral vasodilator therapy. Oral angiotensin-converting enzyme inhibitor and diuretic doses were increased 318% and 89%, respectively. Four patients also received hydralazine to optimize hemodynamics. New York Heart Association functional class improved from 3.8 +/- 0.4 to 2.6 +/- 0.6 following therapy. Ten patients who responded to therapy had fewer hospitalized days during the subsequent year compared with the year before treatment (4 +/- 17 vs 17 +/- 15), and no patient died. In contrast, the 3 patients who responded poorly to therapy tended to have more hospitalized days at 12 months compared with pretreatment (31 +/- 11 vs 20 +/- 18; NS); 1 patient died. We conclude that intravenous milrinone followed by optimization of oral medical therapy may be used as a therapeutic trial to identify patients in need of cardiac transplantation.
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