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Criss-cross heart with discordant atrioventricular connections
Insights
This case study presents a rare criss-cross heart with situs solitus, atrioventricular discordance, and a single outlet where the aorta arises from the right ventricle. Associated defects included pulmonary atresia and ventricular septal defect.
Area of Science:
- Cardiology
- Developmental Biology
- Medical Case Reports
Background:
- Criss-cross heart is a rare congenital anomaly characterized by abnormal spatial arrangement of the great arteries and ventricles.
- Understanding the embryological basis of complex congenital heart diseases is crucial for diagnosis and management.
Observation:
- A case of criss-cross heart with situs solitus, atrioventricular (AV) discordance, and a single outlet (aorta from right ventricle) is described.
- The patient also presented with pulmonary atresia and a ventricular septal defect.
Findings:
- The study observed an apparently normal AV relationship despite AV discordance, suggesting a unique developmental pathway.
- A hypothesis involving an embryonic l-bulboventricular loop followed by counter-clockwise ventricular rotation explains the observed cardiac anatomy.
Implications:
- This case provides insights into the complex embryological mechanisms underlying congenital heart defects.
- Further research into such anomalies can improve diagnostic accuracy and therapeutic strategies for patients with complex cardiac malformations.
Abstract:
A case of criss-cross heart is presented in which there was situs solitus with atrioventricular (AV) discordance and single outlet, the aorta arising from the right ventricle. Associated lesions were pulmonary atresia and ventricular septal defect. The apparently normal AV relation in the presence of a discordant AV connection can be explained by the hypothesis that an embryonic l-bulboventricular loop developed and was followed by marked counter-clockwise rotation of the ventricles.