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Atrioventricular Canal Defects.

D J Murphy1

  • 1The Cleveland Clinic Foundation, Center for Pediatric and Congenital Heart Disease, M-41, 9500 Euclid Avenue, Cleveland, OH 44195, USA.

Current Treatment Options in Cardiovascular Medicine
|November 30, 2000
PubMed
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Early surgical repair of complete atrioventricular (AV) canal defects is recommended before 6 months of age. Echocardiography is key for diagnosis, and surgical techniques offer excellent outcomes with low mortality.

Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease Surgery

Background:

  • Atrioventricular (AV) canal defects are congenital heart abnormalities requiring timely diagnosis and intervention.
  • Pulmonary vascular obstructive disease and growth failure are critical factors influencing surgical timing.

Purpose of the Study:

  • To outline diagnostic and therapeutic strategies for various types of atrioventricular canal defects.
  • To provide guidance on optimal surgical timing and techniques for improved patient outcomes.

Main Methods:

  • Diagnosis primarily relies on echocardiography.
  • Surgical repair strategies include one-patch and two-patch techniques for complete AV canal defects.
  • Management of associated conditions like cleft mitral valve and complex defects (e.g., Tetralogy of Fallot, unbalanced AV canal) is detailed.

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Main Results:

  • Intracardiac surgical repair of complete AV canal defects before 6 months is associated with favorable outcomes.
  • Partial AV canal defects or primum atrial septal defects can be repaired later if uncomplicated.
  • Both one- and two-patch techniques yield excellent results with low mortality for complete AV canal defects.

Conclusions:

  • Timely echocardiography and surgical intervention are crucial for managing AV canal defects.
  • Specific timing and techniques depend on defect type and patient condition, aiming to preserve cardiac function and prevent complications.
  • Complex cases may require staged surgical approaches, including palliative procedures like bidirectional cavopulmonary anastomosis and the Fontan procedure.