[Complete transposition of the major vessels]

Area of Science:

• Cardiovascular Anatomy
• Congenital Heart Disease Research

Background:

• Complete transposition of the great arteries (TGA) is a complex congenital heart defect.
• Understanding the spatial relationships of cardiac structures is crucial for surgical planning in TGA.

Purpose of the Study:

• To investigate the relationship between the subaortic cone and aortic displacement in TGA.
• To analyze the septal morphology and its influence on the positioning of great vessels in TGA.

Main Methods:

• Examination of 16 hearts with complete transposition of the great arteries.
• Assessment of the degree of subaortic cone formation.
• Evaluation of the anterior displacement of the aorta.
• Analysis of interventricular septum morphology and its orientation.

Main Results:

• No correlation was found between the subaortic cone degree and aortic forward displacement.
• The anterior and posterior portions of the interventricular septum were found to be coplanar.
• The conus septum's lack of inversion resulted in an anteroposterior position.
• A slight counterclockwise rotation of the truncus explained the anteroposterior great vessel positioning.

Conclusions:

• Subaortic cone size does not influence aortic displacement in TGA.
• Septal morphology and truncus rotation are key factors in the spatial arrangement of great vessels in TGA.
• These findings contribute to a better understanding of cardiac anatomy in TGA.