Related Experiment Videos
[A morphometric study of the right ventricular infundibulum in complete transposition of the great arteries]
L Muñoz Castellanos1, M Kuri Nivón, J Mallón
1Instituto Nacional de Cardiología Ignacio Chávez, México, D.F.
Insights
In hearts with complete transposition of the great arteries, the right ventricular infundibulum shifts spatially. This anatomical change, observed in transposition of the great arteries, differs significantly from normal heart development.
Area of Science:
- Cardiovascular Anatomy
- Congenital Heart Disease Research
Background:
- Complete transposition of the great arteries (TGA) is a critical congenital heart defect.
- Understanding the spatial orientation of cardiac structures in TGA is crucial for surgical and diagnostic approaches.
Purpose of the Study:
- To investigate and quantify spatial orientation changes of the right ventricular infundibulum in TGA.
- To compare these spatial changes with those in normal hearts.
Main Methods:
- Morphometric analysis of 65 hearts with TGA and 35 normal hearts.
- Measurement of angles formed by the intersection of right ventricular inlet and infundibular origins.
Main Results:
- Hearts with TGA exhibited an average angle of 156.5 degrees.
- Normal hearts showed an average angle of 126.6 degrees.
- A significant difference indicates a vertical shift of the infundibulum in TGA.
Conclusions:
- The right ventricular infundibulum undergoes a significant spatial reorientation in TGA.
- This shift is towards the right, aligning with the aorta's position.
- While TGA originates in the truncus, infundibular positional changes are also involved.
Abstract:
To demonstrate that the right ventricular infundibulum changes its spatial orientation in hearts with complete transposition of the great arteries, sixty five hearts with this malformation, with anterior and right sided aorta were studied morphometrically. The inlet apex and infundibular arises in the right ventricule were interrelated. The angles formed by the intersection of both arises were measured, and the results were compared with those obtained from a similar study in thirty five normal hearts. The angles obtained in the hearts with transposition of the great arteries were of 156.5 degrees, and those measured in the normal hearts were of 126.6 degrees. This difference was interpreted as an indicator of a vertical shift of the right ventricular infundibulum toward the right, to the same side in which the aorta is located and with which it is connected. In this way this outlet looses its leftward direction observed in normal hearts. It is concluded that although complete transpositions of the great arteries developmentally has its origin primarily in the truncus of the embryonic heart, the infundibulum is also involved modifying its position.