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Evaluating Variation in the Cardiac Management of Children with Hereditary Thoracic Aortic Disease in the United States.
Pediatric Cardiology 2024 January
Hereditary thoracic aortic diseases (HTAD) such as Marfan syndrome (MFS), Loeys-Dietz syndrome (LDS), and vascular Ehlers-Danlos syndrome (VEDS) frequently result in complex cardiovascular pathology that can lead to premature death. However, given limited research and lack of detailed pediatric management guidelines, practice in the U.S. is largely guided by personal experience and/or advice from other professionals. A REDCap survey was composed that covered topics including genetic testing, imaging, and medication choice (all in children), among others. After piloting, the survey was distributed via email and advertised on PediHeartNet. Email addresses of providers were obtained through an established aortic research collaborative and a clinic directory offered through The Marfan Foundation. There were 64 survey responses (pediatric cardiologists 66%; geneticists 13%, genetic counselors 6%; the remaining 15% was comprised of a combination of cardiothoracic surgeons, adult cardiologists, adult congenital specialists, combined cardiology and genetics specialist, nurse practitioners, physician assistants, and nurse coordinators). The most supported indication for genetic evaluation in a child with mild aortic root dilation was family history of thoracic aortic dissection (100%), in contrast to mild root dilation with no other HTAD features (39% supported, 45% did not, 15% saying it would depend on other factors). The majority would start medical therapy in MFS at an aortic root z-score of 2, however differences existed regarding medication preferences for initiation (47% angiotensin receptor blockers, 36% beta blockers, 17% would not or cannot prescribe medication/defer medication choice to another provider). Variation existed for cross-sectional imaging indications and modality and for exercise restrictions, although on average respondents were more lenient than the Bethesda guidelines. While there are areas of general agreement in the cardiac management of children with HTAD, there are also several areas of considerable variation. This highlights the need for additional study in these areas with the ultimate goal of creating consensus guidelines.
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