Vasodilator Therapy for Heart FailureThe Influence of Impedance on Left Ventricular PerformanceCohn, Jay N.Author informationFrom the Department of Medicine, Georgetown University Medical Center and the Veterans Administration Hospital, Washington, D. C.Received January 25, 1973; revision accepted for publication March 2, 1973.Circulation 48(1):p 5-8, July 1973.Copyright © 1973 American Heart Association, Inc.