Copyright © 1983 by the European Society of Cardiology.
© 1983, by the European Society of Cardiology
Intravenous isosorbide dinitrate in acute left ventricular failurea doseresponse study
Freeman Hospital, Newcastle upon Tyne and United Birmingham Hospitals England
Received 7 July 1981; revised 23 November 1982; .
Requests for reprints to: Dr D. J. Gwilt, Queen Elizabeth Medical Centre, Birmingham B15 2TH.
Abstract
The haemodynamic effects of intravenous isosorbide dinitrate (Cedocard) in patients with severe acute left ventricular failure have been assessed using incremental infusion rates from 50 to 800µmin1. For most patients most of the fall in pulmonary arterial diastolic pressure occurred by 200µg min1, with little further fall at higher doses. At 200µgmin1 pulmonary arterial diastolic pressure fell from 29 to 23 mgHg (P<0.001), there was no significant change in cardiac index (1.9 to 2.0Lmin1m2) or heart rate (108 to 108 beats min1). Despite high doses, no side effects were observed.
Intravenous isosorbide dinitrate is effective and safe in the management of acute severe left ventricular failure. In most patients an infusion rate of about 200µg min1 produces optimal haemodynamic effects.
Key Words: Heart failure therapy isosorbide dinitrate