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Single Ventricle: Radiology Primer for Preprocedural Evaluation.

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Single ventricle is a rare congenital heart defect where one ventricle cannot support two circulations. Imaging is crucial for diagnosis, management, and surgical planning in these complex cases.

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Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Congenital Heart Disease

Background:

  • Single ventricle is a complex congenital heart abnormality where one ventricle is insufficient for dual circulation.
  • It encompasses diverse anatomical and functional variations, posing significant management challenges.

Purpose of the Study:

  • To highlight the critical role of imaging in classifying single ventricle defects.
  • To detail imaging modalities and parameters essential for surgical planning and patient management.

Main Methods:

  • Echocardiography as the primary imaging modality.
  • MRI and CT for complex vascular anatomy assessment when echocardiography is limited.
  • Review of critical imaging parameters for presurgical evaluation.

Main Results:

  • Single ventricle anatomy can involve one or two atria connected to a single ventricle, or hypoplastic ventricles.
  • Functional single ventricle arises from conditions like severe valve dysfunction or obstructive lesions.
  • Key imaging parameters include ventricular/valvular function, vascular anatomy, and hemodynamic factors.

Conclusions:

  • Accurate imaging is vital for classifying single ventricle defects and guiding treatment strategies.
  • Management often involves staged palliation, with biventricular repair or heart transplant as alternatives.
  • Comprehensive presurgical imaging assessment is essential for optimal outcomes.