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MRI of supracristal ventricular septal defects
J Bremerich1, G P Reddy, C B Higgins
1Department of Radiology, University of California, San Francisco 94143-0628, USA.
Abstract:
The MR features of two cases of supracristal ventricular septal defect are described. In both patients, axial SE T1-weighted images demonstrated a defect between the base of the aorta and the upper posterior aspect of the right ventricular infundibulum. Cine MRI in the two cases showed left-to-right shunting with a flow jet in the distal right ventricular outflow tract that propagated into the main pulmonary artery. Both patients had prolapse of the right sinus of Valsalva, and one had aortic insufficiency.
Insights
Magnetic resonance imaging (MRI) effectively visualizes supracristal ventricular septal defects. This technique reveals left-to-right shunting and associated conditions like aortic valve prolapse.
Area of Science:
- Cardiovascular Imaging
- Medical Diagnostics
- Radiology
Background:
- Supracristal ventricular septal defects (SVSD) are a subset of congenital heart disease.
- Accurate imaging is crucial for diagnosis and management of SVSD.
- Magnetic resonance imaging (MRI) offers detailed anatomical and functional assessment.
Observation:
- Two cases of SVSD were evaluated using MRI.
- Axial SE T1-weighted images identified the septal defect location.
- Cine MRI demonstrated left-to-right shunting and flow dynamics.
Findings:
- MRI revealed defects between the aorta and right ventricular infundibulum in both patients.
- Flow jets indicating left-to-right shunting were observed in the right ventricular outflow tract.
- Associated findings included prolapse of the right sinus of Valsalva and aortic insufficiency in one case.
Implications:
- MRI is a valuable tool for characterizing SVSD and associated cardiac anomalies.
- Detailed visualization aids in surgical planning and patient management.
- Understanding MR features improves diagnostic accuracy for complex congenital heart defects.