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Sinus node dysfunction associated with absence of right superior vena cava.
  1. A J Camm,
  2. D Dymond,
  3. R A Spurrell

    Abstract

    A 41-year-old man presented with dizziness associated with sinus bradycardia and sinus arrest. An attempt to implant a transvenous pacing lead was frustrated by absence of the right superior vena cava. The left superior vena cava persisted and drained via the coronary sinus into the right atrium. Absence of the right superior vena cava may present with symptomatic sinus node dysfunction and may require an epicardial demand pacing system.

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