• Pacing Clin Electrophysiol · Apr 2004

    Case Reports

    Dual antegrade response tachycardia induced cardiomyopathy.

    • Deepak Gaba, Behzad B Pavri, Arnold J Greenspon, and Reginald T Ho.
    • Department of Medicine, Division of Cardiovascular Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA.
    • Pacing Clin Electrophysiol. 2004 Apr 1; 27 (4): 533-6.

    AbstractWe 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.

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