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Effect of acute administration of intravenous epoprostenol on pulmonary artery pulsatility measured by intravascular ultrasound. Epoprostenol increased vessel pulsatility from 14.6 (5.2)% to 22.4 (7.0)% (p = 0.0001), and some improvement was detected in 18 of the 20 patients studied (90%).
