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Internal Cardioversion of Persistent Atrial Fibrillation Using Rectilinear Biphasic Waveform

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Abstract

Internal electrical cardioversion is currently used in patients with persistent atrial fibrillation resistant to external electrical cardioversion. In external cardioversion, biphasic waveforms have shown a greater efficacy than monomorphic waveforms. The present study aimed to test the safety and efficacy of rectilinear biphasic waveform in converting patients with persistent atrial fibrillation to sinus rhythm using internal electrical cardioversion, and to compare it with that of classical monophasic waveform. Twenty-seven consecutive patients with persistent AF received 31 internal cardioversions, using monophasic waveform in 11 (group I), and rectilinear biphasic waveform in 20 cases (group II). Baseline patients characteristics were similar in both groups. Multipolar catheters were positioned in the distal coronary sinus and in the high right atrium. Synchronised shocks were delivered using an escalating protocol of 2, 5, 10, 15, 20, 30, and 50 Joules. In group I, 1 patient was resistant to maximal energy (success rate 91%). The mean energy of the maximal shock was 18 ± 13 J. In group II, all patients were converted to sinus rhythm. The mean energy of the maximal shock was 9 ± 5 J (p < 0.01 vs. group I). No significant complications occurred. At 3 months follow-up, 45% of group I and 60% of group II patients remained in sinus rhythm (p = NS).

We conclude that internal cardioversion using rectilinear biphasic waveform is feasible and safe, and requires less energy than classical monophasic waveforms.

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Authors and Affiliations

  1. Cliniques du Sud-Luxembourg, Arlon, Belgium

    Georges H. Mairesse, Monique Raepers, Isabelle Legrand, Imad Baroud, Yvon Deheneffe, Michel Emonts, Jean-Louis Paquay & Kamal Mitri

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  1. Georges H. Mairesse
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  2. Monique Raepers
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  3. Isabelle Legrand
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  4. Imad Baroud
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  5. Yvon Deheneffe
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  6. Michel Emonts
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  7. Jean-Louis Paquay
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  8. Kamal Mitri
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Correspondence to Georges H. Mairesse.

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Mairesse, G.H., Raepers, M., Legrand, I. et al. Internal Cardioversion of Persistent Atrial Fibrillation Using Rectilinear Biphasic Waveform. J Interv Card Electrophysiol 9, 371–375 (2003). https://doi.org/10.1023/A:1027403729049

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  • DOI: https://doi.org/10.1023/A:1027403729049

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