The diagnostic evaluation of patients with complete transposition

Area of Science:

• Pediatric Cardiology
• Congenital Heart Disease
• Diagnostic Imaging

Background:

• Complete transposition of the great arteries (TGA) is a critical congenital heart defect predominantly diagnosed in neonates and infants.
• Accurate preoperative diagnosis is essential for timely and effective surgical intervention.

Purpose of the Study:

• To evaluate the role and efficacy of various diagnostic imaging modalities in the preoperative assessment of complete TGA.
• To determine the necessity of advanced imaging techniques compared to conventional methods.

Main Methods:

• Cross-sectional echocardiography and Doppler techniques are the cornerstone for diagnosis and assessment of associated lesions.
• Echocardiographic imaging guides interventions like balloon atrial septostomy.
• Cardiac catheterization is reserved for specific indications, such as measuring pulmonary vascular resistance or detailed aortic/pulmonary artery visualization.

Main Results:

• Cross-sectional echocardiography reliably diagnoses complete TGA and associated defects in most neonates and infants.
• Doppler studies provide sufficient hemodynamic information for surgical planning, often obviating the need for cardiac catheterization.
• Conventional methods are generally sufficient, with no current evidence supporting the superiority of MRI or transesophageal echocardiography for routine preoperative diagnosis.

Conclusions:

• Echocardiography is the primary, highly effective diagnostic tool for complete TGA in the neonatal and early infancy period.
• Cardiac catheterization and advanced imaging techniques have limited roles in routine preoperative assessment for complete TGA.
• Conventional diagnostic methods remain adequate for guiding surgical management of complete TGA.