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Dual Antegrade Response Tachycardia Induced Cardiomyopathy
Author(s) -
GABA DEEPAK,
PAVRI BEHZAD B.,
GREENSPON ARNOLD J.,
HO REGINALD T.
Publication year - 2004
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.1540-8159.2004.00476.x
Subject(s) - medicine , cardiology , cardiomyopathy , dual (grammatical number) , tachycardia , heart failure , art , literature
We report a rare case of tachycardia induced cardiomyopathy resulting from nearly incessant dual antegrade response tachycardia. Criteria necessary for sustaining dual antegrade responses are discussed, including: (1) sufficient antegrade dissociation of the AV node; (2) absence of retrograde conduction over each AV nodal pathway following antegrade conduction over its counterpart; (3) difference between fast and slow pathway conduction times exceeding His‐Purkinje refractoriness; and (4) critical timing of sinus impulses relative to preceding AV nodal conduction. Both the arrhythmia and cardiomyopathy were successfully treated by slow pathway ablation. (PACE 2004; 27:533–536)