allapinin and Tachycardia--Paroxysmal

Cross-over trial studied comparative effectiveness and tolerance of allapinine, rhythmonorm and isoptine in patients with paroxysmal supraventricular tachycardia (PSVT). Treatment effects did not differ much. Analysis of the preventive efficiency of the above drugs with reference to PSVT form has demonstrated that in paroxysmal atrioventricular reciprocal tachycardia the highest activity was shown by isoptine and rhythmonorm, in paroxysmal orthodromic reciprocal tachycardia--by rhythmonorm and allapinin. In long-term therapy, a preventive effects of allapinin, rhythmonorm and isoptine achieved at short-term course therapy persisted in 90.9, 95.6 and 81.5% patients, respectively. All the above drugs cause moderate inhibition of atrioventricular and intraventricular conduction. Isoptin had the best tolerance.

Topics: Aconitine; Adolescent; Adult; Aged; Anti-Arrhythmia Agents; Cross-Over Studies; Female; Humans; Male; Middle Aged; Tachycardia, Paroxysmal; Tachycardia, Supraventricular; Verapamil

A double blind randomized cross-over study was conducted to analyze antiarrhythmic activity of the new Soviet drugs allapinin , ethacizine in comparison with mexitil. Altogether 33 patients with ventricular disorders of cardiac rhythm of high gradations after Lown B. were investigated including patients with paroxysmal ventricular tachycardia. The authors managed to establish and compare the group antiarrhythmic efficacy and safety of each drug, and to assess a degree of selective efficacy of each of them.

Topics: Aconitine; Aconitum; Adolescent; Adult; Aged; Anti-Arrhythmia Agents; Chronic Disease; Clinical Trials as Topic; Double-Blind Method; Drug Evaluation; Female; Humans; Male; Mexiletine; Middle Aged; Phenothiazines; Random Allocation; Tachycardia, Ectopic Junctional; Tachycardia, Paroxysmal; Tachycardia, Supraventricular

Antiarrhythmic therapy of patients with disturbed automatism of the sinus node and impaired atrioventricular conductance may be complicated by hemodynamically significant bradycardias and contraindications for implantation of a cardiac electrical stimulator This study aimed at estimating effect of antiarrhythmic therapy with allapinin on the function of sinus and atrioventricular nodes. It included 20 patients (mean age 37.5+-2.3 years) with disturbed cardiac rhythm and sinus node dysfunction treated with allapinin (37.5 - 50 mg/d per os). This therapy had well apparent antiarrhythmic effect manifest as improvement of supraventricular and ventricular ectopic activities in the absence of negative influence on the function of sinus and atrioventricular nodes.

Topics: Aconitine; Adult; Anti-Arrhythmia Agents; Bradycardia; Depression, Chemical; Dose-Response Relationship, Drug; Drug Monitoring; Electrocardiography, Ambulatory; Electrophysiologic Techniques, Cardiac; Female; Heart Conduction System; Heart Rate; Humans; Male; Sick Sinus Syndrome; Tachycardia, Paroxysmal; Treatment Outcome; Ventricular Premature Complexes

Doppler echocardiography is an excellent tool to study the hemodynamic effects of cardiac drugs. Resting and exercise effects produced by metoprolol and allapinin on Doppler-derived measures of left ventricular (LV) performance were examined in patients with paroxysmal supraventricular tachycardias. Seventeen patients underwent continuous wave Doppler examination from the suprasternal notch at rest and during each stage of a standard exercise protocol. The study was repeated following 3-4 days of treatment with metoprolol given in a daily dose of 200 mg. The hemodynamic effects of allapinin, 100 mg daily, were evaluated in the same manner in 8 patients. With metoprolol, all resting Doppler measurements were altered insignificantly and all Doppler--derived parameters of aortic flow (peak, velocity, mean acceleration, cardiac index and LV ejection force) were much lower at the maximum exercise. Allapinin failed to alter any Doppler measurements of aortic blood flow at rest or during the peak exercise.

Topics: Aconitine; Adolescent; Adult; Echocardiography, Doppler; Exercise Test; Hemodynamics; Humans; Metoprolol; Middle Aged; Rest; Tachycardia, Paroxysmal; Tachycardia, Supraventricular

An intracardiac electrophysiological study was undertaken to examine 15 patients with paroxysmal supraventricular tachycardias. Allapinin intravenously given in a dose of 0.4 mg/kg, was tested for effects. The agent was demonstrated to cause a substantial inhibition of rapid retrograde pathway function in atrioventricular nodal tachycardia and abnormal antero- and retrograde pathway function. This is the major aspect of the drug's action that prevents the development of episodes of paroxysmal supraventricular tachycardias. The agent fails to virtually affect the function of the atrioventricular node in the anterograde direction in the two types of the tachycardia. Thus, allapinin has the mechanism of action that is typical of quinidine-like drugs used in supraventricular tachycardias.

Topics: Aconitine; Adult; Anti-Arrhythmia Agents; Atrioventricular Node; Cardiac Pacing, Artificial; Female; Humans; Injections, Intravenous; Male; Middle Aged; Tachycardia, Atrioventricular Nodal Reentry; Tachycardia, Paroxysmal

Twenty one patients with various forms of paroxysmal supraventricular tachycardias (SVT) were treated with allapinine, a new antiarrhythmic drug. Intravenous infusion of allapinine (0.43 mg/kg) arrested the episodes of SVT in none of 7 patients. Oral administration of the drug for short-term treatment (150 mg/day) prevented the artificial induction or spontaneous occurrence of paroxysms in 10 of 16 patients. Thus, the first experience with allapinine shows its potential efficacy in the prophylactic treatment of paroxysmal SVT.

Topics: Aconitine; Aconitum; Adult; Anti-Arrhythmia Agents; Cardiac Pacing, Artificial; Drug Evaluation; Electrocardiography, Ambulatory; Female; Humans; Male; Middle Aged; Tachycardia, Paroxysmal