Initial energy for external electrical cardioversion of XXXX .

@entity1 @entity1457 @entity955
OBJECTIVE: To investigate the initial energy level required for electrical cardioversion of @entity955 ( @entity955 ). METHODS: We studied @entity1 undergoing electrical cardioversion in the 1st Multicenter Trial of SOCESP. @entity1 were divided into 2 groups according to the initial energy level of electrical cardioversion: 100J and >/=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 @entity1 underwent electrical cardioversion. In 53 @entity1 (62%), cardioversion was started with 100J, and in 33 @entity1 (38%), cardioversion was started with >/=150J. Groups did not differ regarding clinical features and therapeutical interventions. A tendency existed towards greater efficacy of the @entity1457 in @entity1 who received >/=150J (61% vs. 42% in the 100J group, p=0.08). The number of shocks was smaller in the >/=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 @entity1 with recent-onset @entity955 (</=48h), the cumulative energy level was lower in the 100J group (240+/-227J vs. 324+/-225J, p=0.03). CONCLUSION: @entity1 who were given initial energy of >/=150J received fewer counter shocks with a tendency toward greater success than those @entity1 who were given 100J; however, in @entity1 with recent-onset @entity955 , the average cumulative energy level was lower in the 100J group. These data suggest that electrical cardioversion should be initiated with energy levels >/=150J in @entity1 with chronic @entity955 .
