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Antidromic His Capture during Entrainment of Orthodromic AVRT
Author(s) -
NAIR KRISHNAKUMAR,
SELVARAJ RAJA,
FARID TALHA,
NANTHAKUMAR KUMARASWAMY
Publication year - 2010
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.2010.02759.x
Subject(s) - orthodromic , medicine , tachycardia , antidromic , cardiology , entrainment (biomusicology) , accessory pathway , atrioventricular reentrant tachycardia , atrioventricular node , qrs complex , reentry , anesthesia , ablation , catheter ablation , electrophysiology , rhythm
A narrow QRS tachycardia with eccentric atrial activation is presented with features favoring an orthodromic atrioventricular re‐entrant tachycardia including an extranodal paraHisian response, and a short corrected post‐pacing interval to tachycardia cycle length difference following right ventricular entrainment. However, during entrainment, the H‐H interval was entrained by the pacing train several beats prior to the A‐A interval which would suggest an atrioventricular nodal re‐entry tachycardia. We discuss the diagnosis and its mechanism. (PACE 2010; 33;1153–1156)