Atrioventricular Canal Defects

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.

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.