A macroreentrant atrial tachycardia ablated within the superior vena cava

Published:January 30, 2023DOI:
      A 75-year-old man was referred for the treatment of a narrow QRS tachycardia. Electrophysiological testing demonstrated that the narrow QRS tachycardia was an atrial tachycardia. Catheter ablation of the tachycardia was performed using the Rhythmia mapping system (Boston Scientific, Marlborough, MA). By mapping the superior vena cava (SVC) using a mini-electrode basket catheter (Orion, Boston Scientific), a reentry circuit around the points traced by Lumipoint algorithms (Boston Scientific) was demonstrated (Figure 1A and Online Supplemental Video 1). The activation map of the SVC encompassed 100% of the tachycardia cycle length. Extrastimulus pacing in the vicinity of the highlighted points reset the tachycardia with a postpacing interval identical to the tachycardia cycle length.
      Figure thumbnail gr1
      Figure 1A: Activation mapping of the tachycardia; B: Mapping during sinus rhythm.


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        • Martin C.A.
        • Takigawa M.
        • Martin R.
        • et al.
        Use of novel electrogram “Lumipoint” algorithm to detect critical isthmus and abnormal potentials for ablation in ventricular tachycardia.
        JACC Clin Electrophysiol. 2019; 5: 470-479