“2 for 1 Phenomenon” on Implantable Cardioverter Defibrillator Intracardiac Tracing

E. R.I.C. McClendon, Takeki Suzuki, Tanyanan Tanawuttiwat, Troy E. Rhodes, Ronald D. Berger

Research output: Contribution to journalArticle


“2 for 1 phenomenon” is simultaneous anterograde conduction over the fast and slow pathways of the atrioventricular (AV) nodal pathway, leading to a double ventricular response from each atrial beat. This phenomenon can initiate AV nodal reentrant tachycardia (AVNRT). The unique induction of AVNRT was observed in a patient with an implantable cardioverter defibrillator in our case. Minimal to no retrograde invasion of the slow pathway from the anterogradely conducted fast pathway depolarization is the most accepted explanation.

Original languageEnglish (US)
Pages (from-to)1415-1417
Number of pages3
JournalPACE - Pacing and Clinical Electrophysiology
Issue number12
StatePublished - Dec 1 2016
Externally publishedYes



  • 2 for 1 phenomenon
  • ICD

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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