Initial Energy for External Electrical Cardioversion of Atrial Fibrillation
OBJECTIVE - To investigate the initial energy level required for electrical cardioversion of atrial fibrillation (AF). METHODS - We studied patients undergoing electrical cardioversion in the 1st Multicenter Trial of SOCESP. Patients were divided into 2 groups according to the initial energy level o...
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Sociedade Brasileira de Cardiologia (SBC)
2002-08-01
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doaj-bd415cb91b9f46ce84e8855c1e3f5cb72020-11-24T23:43:10ZengSociedade Brasileira de Cardiologia (SBC)Arquivos Brasileiros de Cardiologia0066-782X1678-41702002-08-0179213413810.1590/S0066-782X2002001100004Initial Energy for External Electrical Cardioversion of Atrial FibrillationEdilberto FigueiredoHenrique Horta VelosoAngelo Amato Vincenzo de PaolaOBJECTIVE - To investigate the initial energy level required for electrical cardioversion of atrial fibrillation (AF). METHODS - We studied patients undergoing electrical cardioversion in the 1st Multicenter Trial of SOCESP. Patients were divided into 2 groups according to the initial energy level of electrical cardioversion: 100J and > or = 150J. We compared the efficacy of the initial and final shock of the procedure, the number of shocks administered, and the cumulative energy levels. RESULTS - Eight-six patients underwent electrical cardioversion. In 53 patients (62%), cardioversion was started with 100J, and in 33 patients (38%), cardioversion was started with > or = 150J. Groups did not differ regarding clinical features and therapeutical interventions. A tendency existed towards greater efficacy of the initial shock in patients who received > or = 150J (61% vs. 42% in the 100J group, p=0.08). The number of shocks was smaller in the > or = 150J group (1.5±0.7 vs. 2.1±1.3, p=0.04). No difference existed regarding the final efficacy of electrical cardioversion and total cumulative energy levels in both groups. In the subgroup of patients with recent-onset AF (<=48h), the cumulative energy level was lower in the 100J group (240±227J vs. 324±225J, p=0.03). CONCLUSION - Patients who were given initial energy of > or = 150J received fewer counter shocks with a tendency toward greater success than those patients who were given 100J; however, in patients with recent-onset AF, the average cumulative energy level was lower in the 100J group. These data suggest that electrical cardioversion should be initiated with energy levels > or = 150J in patients with chronic AF.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2002001100004atrial fibrillationarrhythmiaelectrical cardioversion |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Edilberto Figueiredo Henrique Horta Veloso Angelo Amato Vincenzo de Paola |
spellingShingle |
Edilberto Figueiredo Henrique Horta Veloso Angelo Amato Vincenzo de Paola Initial Energy for External Electrical Cardioversion of Atrial Fibrillation Arquivos Brasileiros de Cardiologia atrial fibrillation arrhythmia electrical cardioversion |
author_facet |
Edilberto Figueiredo Henrique Horta Veloso Angelo Amato Vincenzo de Paola |
author_sort |
Edilberto Figueiredo |
title |
Initial Energy for External Electrical Cardioversion of Atrial Fibrillation |
title_short |
Initial Energy for External Electrical Cardioversion of Atrial Fibrillation |
title_full |
Initial Energy for External Electrical Cardioversion of Atrial Fibrillation |
title_fullStr |
Initial Energy for External Electrical Cardioversion of Atrial Fibrillation |
title_full_unstemmed |
Initial Energy for External Electrical Cardioversion of Atrial Fibrillation |
title_sort |
initial energy for external electrical cardioversion of atrial fibrillation |
publisher |
Sociedade Brasileira de Cardiologia (SBC) |
series |
Arquivos Brasileiros de Cardiologia |
issn |
0066-782X 1678-4170 |
publishDate |
2002-08-01 |
description |
OBJECTIVE - To investigate the initial energy level required for electrical cardioversion of atrial fibrillation (AF). METHODS - We studied patients undergoing electrical cardioversion in the 1st Multicenter Trial of SOCESP. Patients were divided into 2 groups according to the initial energy level of electrical cardioversion: 100J and > or = 150J. We compared the efficacy of the initial and final shock of the procedure, the number of shocks administered, and the cumulative energy levels. RESULTS - Eight-six patients underwent electrical cardioversion. In 53 patients (62%), cardioversion was started with 100J, and in 33 patients (38%), cardioversion was started with > or = 150J. Groups did not differ regarding clinical features and therapeutical interventions. A tendency existed towards greater efficacy of the initial shock in patients who received > or = 150J (61% vs. 42% in the 100J group, p=0.08). The number of shocks was smaller in the > or = 150J group (1.5±0.7 vs. 2.1±1.3, p=0.04). No difference existed regarding the final efficacy of electrical cardioversion and total cumulative energy levels in both groups. In the subgroup of patients with recent-onset AF (<=48h), the cumulative energy level was lower in the 100J group (240±227J vs. 324±225J, p=0.03). CONCLUSION - Patients who were given initial energy of > or = 150J received fewer counter shocks with a tendency toward greater success than those patients who were given 100J; however, in patients with recent-onset AF, the average cumulative energy level was lower in the 100J group. These data suggest that electrical cardioversion should be initiated with energy levels > or = 150J in patients with chronic AF. |
topic |
atrial fibrillation arrhythmia electrical cardioversion |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2002001100004 |
work_keys_str_mv |
AT edilbertofigueiredo initialenergyforexternalelectricalcardioversionofatrialfibrillation AT henriquehortaveloso initialenergyforexternalelectricalcardioversionofatrialfibrillation AT angeloamatovincenzodepaola initialenergyforexternalelectricalcardioversionofatrialfibrillation |
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