Determinants of Thoracic Electrical Impedance in External Electrical Cardioversion of Atrial Fibrillation

Stefano Fumagalli, Nadia Boni, Margherita Padeletti, Francesca Gori, Lorenzo Boncinelli, Paolo Valoti, Samuele Baldasseroni, Mauro Di Bari, Giulio Masotti, Luigi Padeletti, Serge Barold, Niccolò Marchionni

Research output: Contribution to journalArticlepeer-review


The success of external cardioversion (ECV) of atrial fibrillation depends on generating sufficient transmyocardial current for defibrillation with minimal myocardial injury. Thoracic electrical impedance plays an important role in the relation between the delivered energy and transmyocardial current. This study assessed the determinants of thoracic electrical impedance in ECV of atrial fibrillation. ECV of atrial fibrillation was performed in 80 consecutive patients (mean age 73 ± 9 years; men 69%; body mass index 26.0 ± 3.6 kg/m2) within 12 months, using biphasic shocks (Multipulse Biowave) delivered through adhesive pads in an anteroposterior position. Thoracic electrical impedance was measured using the first shock. The mean thoracic electrical impedance was 57.7 ± 12.3 Ω (energy 71 ± 43 J, current intensity 33 ± 12 A). Sinus rhythm was immediately restored in 75 patients (94%). Thoracic electrical impedance was greater (60.9 ± 11.8 vs 51.7 ± 11.0 Ω, p = 0.001) in patients requiring >1 shock (65%). At multivariate linear regression analysis (R = 0.761, p 2 increase, p

Original languageEnglish
Pages (from-to)82-87
Number of pages6
JournalThe American Journal of Cardiology
Issue number1
Publication statusPublished - Jul 1 2006

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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