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Obstructive sleep apnea (OSA) in MFS has been described earlier but the prevalence and its relation with the cardiovascular risk is still controversial. This study aimed to further investigate these aspects.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this prospective longitudinal study, we performed an attended polysomnography in 40 MFS patients (60% women, 37\u00a0\u00b1\u00a012.8\u00a0years) and evaluated several cardiovascular parameters through echocardiography, resting electrocardiogram, 24\u00a0hr\u2010Holter monitoring and serum NT\u2010ProBNP measurements.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>We found that OSA was present in 42.5% of the patients and that higher body mass index was the most important factor associated with the presence of OSA. We observed that overweight was present in 27.5% of the patients in the whole cohort and in 55.6% if &gt;40\u00a0years. Furthermore, when evaluating the impact of OSA on the cardiovascular system, we observed that patients with OSA tended to have higher systolic blood pressure, larger distal aortic diameters and a higher prevalence of ventricular arrhythmia. These differences were, however, not significant after adjusting for confounders.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Our study shows a high prevalence of OSA and a high prevalence of overweight in MFS patients. We found some trends between OSA and cardiovascular features but we could not establish a solid association. Our study, however might be underpowered, and a multicenter collaborative study could be very useful to answer some important open questions.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mgg3.805","type":"journal-article","created":{"date-parts":[[2019,6,27]],"date-time":"2019-06-27T09:44:25Z","timestamp":1561628665000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Sleep apnea and the impact on cardiovascular risk in patients with Marfan syndrome"],"prefix":"10.1002","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3094-7807","authenticated-orcid":false,"given":"Laura","family":"Mui\u00f1o\u2010Mosquera","sequence":"first","affiliation":[{"name":"Centre for Medical Genetics Ghent University Hospital Ghent Belgium"},{"name":"Department of Pediatrics, Division of Pediatric Cardiology Ghent University Hospital Ghent 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