Research: Giant Morgagni Hernia and Aorto-Pulmonary Collaterals in a Loeys-Dietz Patient Undergoing Surgery for Aortic Root Aneurysm and Mitral Valve Prolapse

Interdiscip Cardiovasc Thorac Surg

. 2024 Jul 22:ivae136.

 doi: 10.1093/icvts/ivae136. Online ahead of print. https://pubmed.ncbi.nlm.nih.gov/39037933/

Giant Morgagni Hernia and Aorto-Pulmonary Collaterals in a Loeys-Dietz Patient Undergoing Surgery for Aortic Root Aneurysm and Mitral Valve Prolapse

Federica Lo Presti 1Giuseppe Palmiero 2Giuseppe Limongelli 2Alessandro Della Corte 1

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Abstract

The case of a Loeys-Dietz Syndrome patient undergoing mitral valve repair and composite aortic root and valve replacement is here described: pre-operative CT scan unraveled a previously misdiagnosed Morgagni hernia (anterior diaphragmatic), containing omentum only, compressing the right ventricle. Intra-operatively, an abnormal oxygenated blood backflow into the left ventricle was observed, post-operatively found to be caused by major aorto-pulmonary collateral arteries. This is the first case of Morgagni hernia and systemic-pulmonary shunt ever reported associated with Loeys-Dietz Syndrome. These congenital features may be important in both phenotyping and surgical management.

Keywords: Loeys-Dietz Syndrome; Morgagni hernia; aortic root aneurysm; aorto-pulmonary collateral arteries; mitral regurgitation.

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