Figure 2 Phenomena observed during diagnostic process of patient
2
2A: His bundle refractory period ventricular stimuli during tachycardia
either reset or terminated tachycardia. 2B: RVA entrainment at different
cycle lengths generated different fusion QRS morphologies, indicating
ventricular myocardium took part in the reentry. 2C: EGM at successful
ablation target and fluoroscopy showed the successful ablation target at
the triangle of Koch. 2D: Sketch map of the mechanism in different
situations. EGM=electrogram