Electrophysiologic effects of enoximone in patients with congestive heart failure.
The electrophysiologic effects of enoximone were evaluated in 12 patients with idiopathic dilated cardiomyopathy undergoing routine programmed electrical stimulation (PES). Enoximone (1.5 mg/kg for 20 min followed by 0.75 mg/kg for 20 min) significantly shortened the spontaneous sinus cycle length as well as the atrial and ventricular refractory period. Neither during control PES nor during enoximone infusion were sustained ventricular arrhythmias provoked. However, in 5 of 12 patients, there was an increase in the number of repetitive ventricular responses induced by PES during enoximone administration. The observed electrophysiologic changes may be indicators for increased electrical instability of the myocardium in selected patients.
Hohnloser
S H
SH
Department of Cardiology, University Hospital Freiburg, F.R.G.
Zehender
M
M
Geibel
A
A
Meinertz
T
T
Just
H
H
D000328:Adult; D001283:Atrioventricular Node / Q000187:drug effects; D002316:Cardiotonic Agents / Q000097:blood / Q000627:therapeutic use*; D004562:Electrocardiography; D004594:Electrophysiology; D017335:Enoximone; D005260:Female; D006329:Heart Conduction System / Q000187:drug effects; D006333:Heart Failure / Q000188:drug therapy* / Q000503:physiopathology; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D007093:Imidazoles / Q000097:blood / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged
D002316:Cardiotonic Agents; D007093:Imidazoles; D017335:Enoximone