Deep Burn Following DC Cardioversion: A Case Report

PURPOSE: DC cardioversion is the treatment choice for atrial fibrillation and flutter. Because of the high voltage power across the thorax, most patients suffer some degree of superficial erythema or burn at the pad site. 2nd or 3rd degree burn and muscle necrosis is very rare after shock. We experienced one case of 3rd degree burn with ulceration after DC cardioversion. METHODS: A 44-year-old male was admitted to local hospital with the presenting palpitation and atrial fibrillation on ECG. During radiofrequency catheter ablation (RFCA) for the treatment of atrial fibrillatoin, DC cardioversion was performed. The patient did not complain of any pain or discomfort at the pad site during or immediately after the procedure. Approximately 14 days after the shock, he had blisters at the pad site. But he received simple dressing treatment at the local hospital for 6 months. When he visited our burn clinic, there was 3x5 cm sized 3rd degree burn with eschar and necrotic fat tissue at the pad site of right back. Surgical removal of a necrotic tissue was performed on the patient by STSG (Split thickness skin graft) with Matriderm(R). RESULTS: Muscle fascia was exposed after debridement of the necrotic skin and fat tissue. The skin graft was well taken within 2 weeks after operation. CONCLUSION: In case of using monophasic 360 J, approximately 3,000 V energy is discharged. The energy is sufficient to cause burn injury to skin. Damage may result both thermal burn and electrical burn. The burn degree in the electric circuit is proportional to amperage and time, is inversely proportional to pad site area. We therefore suggest that in order to reduce deep burn, DC cardioversion is started with lower energy shocks, proper pad placement and correct pad application is important. And we give a notice that deep pad burn possibly occur after the cardioversion procedure.

The long-term follow-up results of the Electrical Cardioversion of Chronic Nonvalvular Atrial Fibrillation / 대한내과학회지

OBJECTIVES:We performed a prospective observation for the patients with chronic nonvalvular atrial fibrillation who underwent electrical cardioversion after failed pharmacological cardioversion with amiodarone. The aim of this study was to look at the immediate sinus conversion rate, the maintenance rate of sinus rhythm at long-term follow-up, and the clinical and echocardiographic parameters that influence on the rate of immediate sinus conversion and maintenance of sinus rhythm. At simultaneously, we intended to evaluate the efficacy of electrical cardioversion for the patients with chronic nonvalvular atrial fibrillation. METHODS: After anticoagulation therapy with coumadine for four weeks before cardioversion, we tried pharmacological cardioversion with amiodarone first. Failed cases included in this study. The direct current cardioversion was performed under transesophageal echocardiography monitoring to exclude the left atrial thrombus and to measure various echocardiographic parameters. After successful sinus cardioversion, we prescribed amiodarone with maintenance doses and coumadine at least 4 weeks. Transthoracic echocardiography was performed before cardioversion and one day, one month, 3 months, 6 months, and 9 months after sinus conversion. The minimum duration of atrial fibrillation was one month before the trial of pharmacological cardioversion. RESULTS: 1) The total number of patients was forty three (male: 28, female: 15, average age: 60+/-9). The initial success rate of sinus conversion was 88 %. 2) The maintenance rate of sinus rhythm with maintenance dose of amiodarone was 52 % after 9 months follow-up. 3) The direct current cardioversion was performed to 10 patients among 17 patients who recurred atrial fibrillation after sinus conversion. Among 10 patients, 5 patients of them were converted to sinus rhythm and maintained sinus rhythm after 9 months follow-up. 4) The initial success rate of sinus conversion was significantly higher in patients with lone atrial fibrillation compared with those patients with other associated heart disease (100 % vs. 83 %, p < 0.05), but the long-term maintenance rate of sinus rhythm was not influenced by the presence of associated disease. 5) The duration of atrial fibrillation before cardioversion was shorter in patients who were naintained sinus rhythm than that of those who were recurred atrial fibrillation. 6) The initial energy requirement at sinus conversion was lower in the patients who were maintained sinus rhythm than that of those who were recurred atrial fibrillation at 9 months follow-up. CONCLUSIONS: Direct current cardioversion was an effective treatment modality for patients with chronic nonvalvular atrial fibrillation after failure of pharmacological cardioversion with amiodarone.