Pseudoaneurysm formation after infected modified Blalock-Taussig shunt: Echocardiographic findings

The modified Blalock-Taussig (B-T) shunt is well recognized as a palliative procedure for cyanotic congenital heart disease in, infants. Pseudoaneurys m formation after a modified B-T shunt is a rare complication. We present t he case of a 9-month-old girl with tetralogy of Fallot who had undergone a modified left B-T shunt at 5 months of age and developed a pseudoaneurysm a fter art episode of infective endocarditis as detected by echocardiography. Compression of the left bronchus, displacement of the mediastinum to right chest, and paralysis of the left hemidiaphragm were found. Magnetic resona nce images, computed tomography scans, aortograms, and selective angiograms demonstrated the presence of a large pseudoaneurysm. The compression syndr ome gradually disappeared after aneurysmectomy.