Why the study?
During catheter ablation of tachycardia, conventional point-by-point mapping may be hindered due to hemodynamic instability.
Open-window mapping is a useful technique for rapid and accurate mapping of accessory pathways during hemodynamically unstable AVRT.
May aid rapid mapping in unstable AVRT; hypothesis-generating and requires prospective validation before broader use.
During catheter ablation (CA) of tachycardia, conventional point-by-point mapping may be hindered due to hemodynamic instability. We performed open-window mapping (CARTO, Biosense Webster, USA) in a patient who developed hemodynamic instability during orthodromic atrioventricular reciprocating tachycardia (AVRT) and unwarranted induction of AVRT during attempts to map accessory pathway (AP) with ventricular pacing. With over 11,000 points acquired rapidly, the system accurately identified AP at the mitral valve (MV) annulus where the application of single radiofrequency (RF) lesion promptly eliminated AP's conduction. Our case illustrates the utility of open-window mapping for the ablation of AVRT.
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Kantharia et al. (2023) studied this question.
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