Figure 1 Phenomena observed during diagnostic process of patient
1
1A: 4 rhythms and the corresponding A-H-V relationships. 1B: His bundle
refractory period ventricular stimuli during tachycardia either reset or
terminated tachycardia. 1C: RVA pacing dissociated V and H and
fluoroscopy showed the successful ablation target at the triangle of
Koch. 1D: Sketch map of the mechanism in different situations. RVA=right
ventricular apex.