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Clinical benefits, echocardiographic and MRI assessment after pulmonary sequestration treatment.

BACKGROUND: This study aimed to explore systematically procedural results, clinical benefits with echocardiographic and chest-MRI assessment of pulmonary sequestration percutaneous treatment.

METHODS: 13 consecutive infants and children with diagnosis of isolated pulmonary sequestration (PS) had percutaneous closure of the aberrant artery supplying pulmonary sequestration between 2010 and 2015. By protocol, echocardiographic and chest-MRI assessment was performed before and respectively at 6-12months and 1year with the aim to study the effects of embolization on heart volume overload and regression of pulmonary sequestration.

RESULTS: Median age at diagnosis was 1year (95%CI 0-2.6); median age at treatment was 1.3years (95%CI1.01-2.85). In all pts the PS was confirmed by chest-MRI. Procedural success was 100%. After treatment, pts experiencing previously respiratory symptoms/infections remained asymptomatic at 2.9year follow-up. In pts with significant shunt due to PS, treatment resulted in amelioration in left or right cardiac chamber enlargement at 6 and 12month follow-up. At distance from PS closure (median 14months), chest-MRI confirmed the closure of the aberrant artery and PS regression in 12 patients. In one case, despite the acute procedural success and the supplying artery remained closed, MRI detected residual PS revascularization.

CONCLUSIONS: Percutaneous PS closure in infants and children is safe and provide regression in respiratory symptoms and heart chamber dilatation if significant shunt is present. MRI is able to define aberrant artery course and PS parenchima, and might represent a valid instrument to study residual PS parenchima during growth.

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