cc TGA, how to diagnose by echocardiography?

Corrected transposition of the great arteries (ccTGA) is characterized by abnormal connections between the atrium, ventricles, and great arteries (atrioventricular and ventriculoarterial discordance).
Utilizing the segmental approach is essential for determining the atrial situs, ventricular situs, and great artery arrangement to diagnose ccTGA.

Also, search for the associated defects:

Ebstein’s anomaly

Ventricular septal defect (VSD)

Left ventricular outflow tract obstruction (sub-pulmonic and/or pulmonary stenosis)