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  • Title: Unmasking of a concealed slow pathway by atrioventricular simultaneous basic pacing.
    Author: Adachi T, Yoshida K, Kuroki K, Yamasaki H, Sekiguchi Y, Nogami A, Aonuma K.
    Journal: J Electrocardiol; 2018; 51(2):338-342. PubMed ID: 29103619.
    Abstract:
    A 71-year-old woman with narrow QRS tachycardia was referred for catheter ablation. The clinical tachycardia was diagnosed as slow/fast form of atrioventricular (AV) nodal reentrant tachycardia (AVNRT) with the upper common pathway. Although neither conventional nor double atrial programmed extrastimulation (APS) showed any evidence of a dual AV nodal pathway, AV simultaneous pacing during basic stimulation preceding APS (AVSP-APS) reproducibly revealed a dual AV nodal pathway as a double ventricular response. The AVSP-APS pacing method may be helpful to unmask a "concealed slow pathway" in patients with AVNRT.
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