Ventricular septal defect in interruption of aortic arch

Area of Science:

• Cardiovascular Pathology
• Congenital Heart Disease
• Pediatric Cardiology

Background:

• Interruption of the aortic arch is a critical congenital heart defect.
• Understanding the associated cardiac anomalies is crucial for diagnosis and treatment.
• Ventricular septal defects and subaortic obstruction are frequently observed but not fully characterized.

Purpose of the Study:

• To characterize ventricular septal defects (VSDs) in patients with interruption of the aortic arch.
• To elucidate the anatomical basis of subaortic obstruction in this patient cohort.
• To investigate potential correlations between VSD type, subaortic obstruction, and aortic arch interruption patterns.

Main Methods:

• A necroscopy study was conducted on 34 patients diagnosed with interruption of the aortic arch.
• Detailed examination of the heart and great vessels was performed.
• Anatomical features, including VSD location, great artery relationship, and aortic arch interruption site, were documented.

Main Results:

• Ventricular septal defects were present in 32 out of 34 patients.
• Conoventricular malalignment leading to subpulmonary VSDs was common (21 patients).
• Subaortic obstruction potential was identified in several VSD types, but no clear association with specific aortic arch interruption types was found.

Conclusions:

• Ventricular septal defects are nearly universal in interruption of the aortic arch.
• Conoventricular malalignment is a significant factor contributing to subaortic obstruction.
• The specific type of aortic arch interruption does not predict the presence or absence of subaortic obstruction.