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Randomized Comparison of Efficacy of Cooled Tip Catheter Ablation of Atrial Flutter: Anatomic Versus Electrophysiological Complete Isthmus Block
Author(s) -
MADRID ANTONIO H.,
REBOLLO JOSE M.,
DEL REY JOSE M.,
GONZALO PEÑA,
SOCAS ARPEL,
ALVAREZ TEOFILO,
RODRIGUEZ ANIBAL,
CORREA CARLOS,
CHÉRCOLES ANA,
VÁZQUEZ CHARO,
GARCIACOSIO MONICA,
PALACIOS FERNANDO,
MORO C.
Publication year - 2001
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1046/j.1460-9592.2001.01525.x
Subject(s) - medicine , ablation , atrial flutter , catheter , catheter ablation , electrophysiology , block (permutation group theory) , surgery , cardiology , nuclear medicine , geometry , mathematics
MADRID, A.H., et al. : Randomized Comparison of Efficacy of Cooled Tip Catheter Ablation of Atrial Flutter: Anatomic Versus Electrophysiological Complete Isthmus Block. There is a subset of patients with failed ablation of the cavotricuspid isthmus (CTI) using standard catheters and with 10% of the patients having recurrences. The purpose of this study was to compare the cooled and standard ablation with regard to acute successful electrophysiological achievement of bidirectional isthmus block and the subacute anatomic characteristics of the lesions. This randomized, experimental study compares the effects of ablation on the isthmus using a cooled catheter with those of a standard ablation catheter in 16 pigs. In 12 animals, CTI block was achieved after ablation (8/8 cooled and 4/8 standard). In two animals, it was not possible to achieve complete isthmus block and two had persistent slow conduction (all four using the standard catheter). After 1 week, the animals were slaughtered. The size of the lesion was greater with the irrigated tip catheters. Transmural lesions were found in 14 animals. A complete line of anatomic isthmus block was not documented after the first line in six animals, four with the standard and two with the cooled catheter. A conduction block was never present across gaps ≥ 5 mm. In conclusion cooled catheters achieved a complete line of electrophysiological and anatomical block in a significantly higher percentage than the standard catheters.