Irregularly irregular AVNRT misdiagnosed by smartwatch
Abstract
A fifty-one-year-old woman presented with an irregularly irregular rhythm noted on a smartwatch. EP study revealed a narrow complex A-on-V tachycardia with significant cycle-length variability. Pacing maneuvers were consistent with atrioventricular nodal re-entry tachycardia (AVNRT), and we performed slow pathway modification. While AVNRT can have some degree of variability - particularly on warm up - the amount of irregularity here was striking, and much more than we have ever encountered or than has been previously reported in the literature.
Fields of Study & Subjects
Cardiac Arrhythmias and Treatments
Cardiac electrophysiology and arrhythmias
Cardiac pacing and defibrillation studies
Publication details
- Journal / source
- Indian Pacing and Electrophysiology Journal
- Volume
- 26
- Issue
- 3
- Pages
- 247–250
- Publication date
- 9 February 2026
- Language
- EN