CTICasesCongenital Pulmonic Valve Stenosis
Imaging findings
CT angiography shows thickening and dome-like systolic configuration of the pulmonic valve leaflets, post-stenotic dilation of the main pulmonary artery, and asymmetric pulmonary arterial caliber (thin, scrawny distal branches) causing asymmetric perfusion on V/Q scan.
Key takeaways
Congenital pulmonic valve stenosis causes right ventricular outflow tract obstruction and high-velocity jet flow, leading to post-stenotic dilatation of the main pulmonary artery. The turbulent flow can lead to asymmetric distribution of blood flow and vascular remodeling, mimicking pulmonary embolism on V/Q scan.
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