Effects of chronic aminodarone therapy on ventricular tachycardia induced by programmed ventricular stimulation
| Autor: | Fred Morady, Jeffrey M. Baerman, Lois Schurig, Lorenzo A. DiCarlo, Thomas M. Annesley, Michael de Buitleir |
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| Rok vydání: | 1987 |
| Předmět: |
Male
Tachycardia medicine.medical_specialty medicine.medical_treatment Amiodarone Ventricular tachycardia chemistry.chemical_compound Internal medicine medicine Humans Prospective Studies Prospective cohort study Aged Chemotherapy Triiodothyronine business.industry Middle Aged medicine.disease Electric Stimulation Reverse triiodothyronine Electrophysiology chemistry Anesthesia Ventricular Fibrillation Ventricular fibrillation Cardiology Female medicine.symptom Cardiology and Cardiovascular Medicine business medicine.drug |
| Zdroj: | American Heart Journal. 113:57-64 |
| ISSN: | 0002-8703 |
| DOI: | 10.1016/0002-8703(87)90009-3 |
| Popis: | Several studies have reported upon the inducibility of ventricular tachycardia (VT) with programmed ventricular stimulation (PVS) during chronic amiodarone therapy; however, few studies have systematically described and compared the morphology, duration, and cycle length of VT induced by PVS before and after amiodarone. In this study, 26 patients with symptomatic VT or ventricular fibrillation were evaluated by PVS by means of one to three extrastimuli (ES) before treatment and after 2 months of amiodarone therapy. Before amiodarone, sustained unimorphic VT was induced in 21 patients (group A) and symptomatic, nonsustained VT was induced in five patients (group B). After 65 +/- 8 days of amiodarone (total dose 64.5 +/- 8.9 gm, mean +/- S.D.), 15 of 21 patients (71%) in group A had sustained VT, five patients (24%) had nonsustained VT, and one patient had no VT induced. Four of five patients (80%) in group B had sustained VT and one patient had no VT induced. VT was induced by the same or by fewer number of ES in 79% of cases. When the morphologies of the VT induced before and after amiodarone were compared, the morphology of VT induced after amiodarone was the same in only 8 of 24 patients (33%), unimorphic but different in 14 patients (58%), and polymorphic in the remaining two patients. No correlation was found between the serum concentrations of amiodarone, desethylamiodarone, tetraiodothyronine, triiodothyronine, or reverse triiodothyronine, and similarities or differences in VT morphology, VT cycle length, or the relative number of ES required to induce VT after treatment with amiodarone.(ABSTRACT TRUNCATED AT 250 WORDS) |
| Databáze: | OpenAIRE |
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