Superior vena cava rhythm masquerading as normal sinus rhythm

Yoga Yuniadi, Ching Tai Tai, Yenn Jang Lin, Shih Ann Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We report the case of a patient with persistent cardiac rhythm originating from the superior vena cava (3 cm above the vena cava-atrial junction). It was detected by non-contact balloon mapping before induction of tachycardia and confirmed by conventional contact mapping with image studies. Thus, a 12-lead ECG showing normal morphologies of P waves may not indicate that the P waves are of sinus node origin. (J Cardiovasc Electrophysiol, Vol. 15, pp. 950-952, August 2004).

Original languageEnglish
Pages (from-to)950-952
Number of pages3
JournalJournal of cardiovascular electrophysiology
Issue number8
StatePublished - Aug 2004


  • Noncontact mapping
  • Sinus node dysfunction
  • Superior vena cava rhythm


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