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Detour Conduction Can Mimic Complete Conduction Block at the Cavo‐Tricuspid Isthmus
Author(s) -
YAMADA TAKUMI,
MURAKAMI YOSHIMASA,
PLUMB VANCE J.,
KAY G. NEAL
Publication year - 2007
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 - 10.1111/j.1540-8159.2007.00591.x
Subject(s) - medicine , cardiology , thermal conduction , block (permutation group theory) , electrical conduction system of the heart , conduction abnormalities , electrocardiography , combinatorics , materials science , mathematics , composite material
A 54‐year‐old man with typical atrial flutter underwent linear ablation at the cavo‐tricuspid isthmus. Though standard tricuspid annulus (TA) mapping and differential pacing suggested complete isthmus conduction block, electroanatomic mapping revealed that detoured conduction through a residual conduction gap around the inferior vena cava far from the TA mimicked complete conduction block. Though the double potential interval along the block line was not long enough to guarantee a complete line of block after eliminating the conduction gap, electroanatomic remapping accurately confirmed a complete block line, suggesting electroanatomic mapping may be the most reliable method to confirm complete isthmus conduction block.