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Updated: Jun 30, 2026

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
Published on: May 23, 2021
[A long RP tachycardia - an electrophysiological puzzle]
1I Klinika Kardiologii i Nadciśnienia Tetniczego, Szpital Uniwersytecki, ul. Kopernika 17, 31-501 Kraków, Poland. mcjastrz@cyf-kr.edu.pl
Abstract:
A case of a 30-year-old male with paroxysmal long RP tachycardia is presented. During electrophysiological study the clinical arrhythmia (atypical atrioventricular nodal reentrant tachycardia - AVNRT) was misdiagnosed as ectopic left atrial tachycardia due to ventricle-atrium-atrium-ventricle (VAAV) response after entrainment, eccentric atrial activation sequence and easiness in achieving atrio-ventricular dissociation with ventricular pacing during the tachycardia. Reassessment of the VAAV response lead to recognition of pseudo-VAAV response often seen in atypical, fast-slow AVNRT. Subsequent ablation of the slow pathway at standard site in the triangle of Koch was successful in eliminating the tachycardia.
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