[Idiopathic ventricular tachyarrhythmia. Spontaneous variability and effect of various antiarrhythmic agents].
20 patients with idiopathic complex ventricular arrhythmias received propafenone 450 mg/d, disopyramide 600 mg/d and metoprolol 100 mg/d. Before commencement of the 3-week treatment period the 95% normal range for spontaneous changes in ventricular extrasystoles (VES), as couplets and runs, were determined from three 24 h-ECG recordings in each patient under drug-free conditions. A drug effect was assumed when the rate of VES/24 h for the control period decreased by greater than or equal to 83.5% or increased by greater than or equal to 505% in the test period. The frequency dependent normal range for couplets varied between a decrease from 100% to 92% (greater than or equal to 16 to greater than or equal to 44/d) and an increase from 650% to 1000% (greater than or equal to 3 to greater than or equal to 38/d) and for runs between a decrease from 100% to 85% (greater than or equal to 6 to 32/d) and an increase from 600% to 1000% (greater than or equal to 1 to 14/d). A decrease in all rhythm disturbances under the action of the 3 drugs could be shown for the whole group (P less than 0.01). On the basis of the calculated normal range, ventricular extrasystoles in the patients decreased significantly by 26-37%, couplets by 13-33% and runs by 0-55% depending to the drug. A drug dependent arrhythmogenic effect occurred in 4 patients. A preference for one or other of the drugs could not be established statistically.
J
J
Korsukewitz
K
K
Wegscheider
H
H
Schmutzler
D000328:Adult; D000889:Anti-Arrhythmia Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D005117:Cardiac Complexes, Premature / Q000188:drug therapy* / Q000503:physiopathology; D002986:Clinical Trials as Topic; D004206:Disopyramide / Q000008:administration & dosage / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D004341:Drug Evaluation; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male; D008790:Metoprolol / Q000008:administration & dosage / Q000627:therapeutic use; D008875:Middle Aged; D011405:Propafenone; D011427:Propiophenones / Q000008:administration & dosage / Q000627:therapeutic use; D013610:Tachycardia / Q000188:drug therapy* / Q000503:physiopathology
D000889:Anti-Arrhythmia Agents; D011427:Propiophenones; D011405:Propafenone; D008790:Metoprolol; D004206:Disopyramide
Idiopathische ventrikuläre Tachyarrhythmien. Spontanvariabilität und Wirkung verschiedener Antiarrhythmika.