RT-195
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Radiofrequency ablation of
atrial tachycardia: mapping techniques
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Carlo Pappone, Giuseppe Stabile*,
Antonio De Simone*, Francesco Furlanello, Maria Luisa Loricchio, Patrizio Mazzone, Stefano
Bianchi, Tiziana Russo, Cosimo Dicandia, Sergio Chierchia.
Cardiology Department, S. Raffaele Hospital, Milan, *Laboratory of
Electrophysiology, Clinica San Michele, Maddaloni (CE), Italy
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Introduction
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Atrial tachycardia is an uncommon form of
supraventricular arrhythmia which is frequently associated with dilated cardiomyopathy.
Cardiac dilatation has been demonstrated to be reversible with control of arrhythmia1-3. Because medical treatment is of limited efficacy4-7 and surgery has intrinsic limitations2,8-12 radiofrequency catheter ablation has been suggested
as a highly effective technique with low incidence of side effects. In a previous study we
assessed the efficacy of different mapping techniques (earliest atrial activation,
pacemapping) and the role of mechanical interruption of tachycardia in identifying the
exact site of automatic focus28.
Aim of this study is to report the results and follow-up of radiofrequency catheter
ablation of drug refractory atrial tachycardia in 132 consecutive patients.
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Key Words
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Cardiac arrhythmias - mapping
atrial tachycardia, mapping techniques, AP interval, atrial activation, pacemapping
concordant sequence, radiofrequency catheter ablation, automaticity of ectopic focus,
intra-atrial/sino-atrial node reentry, OA
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