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Related Experiment Videos

Superior vena cava rhythm masquerading as normal sinus rhythm.

Yoga Yuniadi1, Ching-Tai Tai, Yenn-Jang Lin

  • 1Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Taipei Veterans General Hospital, Taipei, Taiwan.

Journal of Cardiovascular Electrophysiology
|August 31, 2004
PubMed
Summary

A patient

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Imaging

Background:

  • Persistent cardiac rhythm can originate from ectopic sites.
  • Accurate localization of rhythm origin is crucial for effective treatment.

Observation:

  • A patient presented with a persistent cardiac rhythm originating from the superior vena cava, 3 cm above the vena cava-atrial junction.
  • Noncontact balloon mapping and conventional contact mapping with image studies were used for detection and confirmation.

Findings:

  • The study identified the superior vena cava as the origin of the patient's cardiac rhythm.
  • This finding challenges the assumption that normal P-wave morphology on a 12-lead ECG always indicates sinus node origin.

Implications:

Related Experiment Videos

  • Clinicians should consider ectopic atrial rhythms even with normal P-wave morphology.
  • Advanced mapping techniques are valuable for diagnosing complex cardiac arrhythmias.
  • This case highlights the importance of comprehensive electrophysiological evaluation.