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Persistent left superior vena cava: a blessing in disguise

Naser Imran1, Blair Grubb, Yousuf Kanjwal

  • 1Department of Cardiovascular Medicine, University of Toledo Medical Center, 3000 Arlington Avenue, Toledo, OH 43614, USA.

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|March 6, 2008
PubMed

Insights

Persistent left superior vena cava (SVC) is rare but can be beneficial. In a patient needing a cardiac device upgrade, a persistent left SVC provided an alternative access route when the usual left subclavian vein became occluded.

Area of Science:

  • Cardiology
  • Vascular Anatomy

Background:

  • Persistent left superior vena cava (SVC) is a rare congenital anomaly.
  • It is typically identified during central venous catheterization procedures.
  • This anomaly can present diagnostic and therapeutic challenges.

Observation:

  • A patient with biventricular failure required a cardiac device upgrade to a cardiac resynchronization implantable cardioverter defibrillator.
  • The patient had a known persistent left SVC.
  • The patient subsequently developed total occlusion of the left subclavian-innominate venous system.

Findings:

  • The persistent left SVC served as a crucial alternative venous access route for the cardiac device implantation.
  • This anomaly facilitated successful device implantation despite the occlusion of the contralateral venous system.
  • The case highlights the potential utility of persistent left SVC in complex cardiac device procedures.

Implications:

  • Persistent left SVC, though uncommon, can be a valuable anatomical variant in specific clinical scenarios.
  • Awareness of this anomaly is essential for interventional cardiologists and electrophysiologists.
  • This case suggests that persistent left SVC may offer a salvage pathway for venous access in patients with complex venous anatomy or occlusion.

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