{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T16:24:12Z","timestamp":1762273452597,"version":"3.43.0"},"reference-count":43,"publisher":"American Medical Association (AMA)","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"<jats:sec id=\"ab-zoi250705-4\"><jats:title>Importance<\/jats:title><jats:p>Congenital aortic valve disease predominantly manifests as bicuspid aortic valve (BAV), while quadricuspid aortic valve (QAV) is considerably rarer. Whether outcomes vary between these 2 types of congenital aortic valve disease remains unknown.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi250705-5\"><jats:title>Objective<\/jats:title><jats:p>To compare outcomes between patients with QAV and patients with BAV.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi250705-6\"><jats:title>Design, Setting, and Participants<\/jats:title><jats:p>In this cohort study, patients diagnosed with QAV or BAV were retrospectively identified from echocardiographic examinations performed from January 1, 2011, to December 31, 2023, at 2 tertiary hospitals in China. Patients with QAV were propensity score matched 1:5 by age and sex with patients with BAV.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi250705-7\"><jats:title>Exposure<\/jats:title><jats:p>Presence of QAV or BAV.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi250705-8\"><jats:title>Main Outcomes and Measures<\/jats:title><jats:p>Outcomes of interest included aortic valve intervention (surgical or transcatheter), aortic surgery, aortic dissection, infective endocarditis (IE), heart failure hospitalization (HFH), and all-cause death. Morbidity rates were estimated using the cumulative incidence function to account for competing risk of death. Relative survival was calculated as the ratio of observed survival to the expected survival in the general population.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi250705-9\"><jats:title>Results<\/jats:title><jats:p>From 2\u202f945\u202f132 echocardiographic examinations, 139 patients with QAV (median age, 54.8 [IQR, 46.2-63.9] years; 85 [61.2%] male) and 695 with BAV (median age, 55.4 [IQR, 45.5-64.2] years; 425 [61.2%] male) were included. Over a median follow-up of 4.8 years (IQR, 2.4-8.0 years), patients with QAV had a similar incidence of aortic valve intervention (77.4% [95% CI, 64.5%-86.1%] vs 75.7% [95% CI, 71.1%-79.8%]; <jats:italic>P<\/jats:italic>\u2009=\u2009.26) but lower incidence of aortic surgery (5.1% [95% CI, 0.9%-15.0%] vs 33.8% [95% CI, 28.4%-39.2%]; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001) and IE (not observed vs 9.6% [95% CI, 6.4%-13.5%]; <jats:italic>P<\/jats:italic>\u2009=\u2009.01) compared with patients with BAV. Aortic dissection was rare in both groups (QAV, 0.9% [95% CI, 0.1%-4.1%]; BAV, 3.6% [95% CI, 1.8%-6.4%]; <jats:italic>P<\/jats:italic>\u2009=\u2009.57). Compared with BAV, QAV morphology was associated with an increased risk of HFH after multivariable adjustments (adjusted hazard ratio [AHR], 2.52; 95% CI, 1.51-4.20; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001). Presence of cardiomyopathies was an independent factor associated with HFH in patients with QAV (AHR, 4.27; 95% CI, 2.26-8.07; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001). The 5-year relative survival rate compared with the age- and sex-matched general population was 102.9% (95% CI, 97.9%-107.2%) for patients with QAV and 102.4% (95% CI, 99.3%-104.8%) for those with BAV.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi250705-10\"><jats:title>Conclusions and Relevance<\/jats:title><jats:p>In this large, retrospective cohort study, both QAV and BAV were associated with a high risk of aortic valve intervention. Individuals with QAV had a greater risk of HFH, while those with BAV had higher incidence of IE and aortic surgery. Despite the substantial morbidity burden, survival in both groups was similar to that in the general population.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2025.24915","type":"journal-article","created":{"date-parts":[[2025,8,4]],"date-time":"2025-08-04T15:00:26Z","timestamp":1754319626000},"page":"e2524915","source":"Crossref","is-referenced-by-count":1,"title":["Clinical Outcomes in Patients With Quadricuspid vs Bicuspid Aortic Valve"],"prefix":"10.1001","volume":"8","author":[{"given":"Jingnan","family":"Zhang","sequence":"first","affiliation":[{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong\u2013Shenzhen Hospital, Shenzhen, China"},{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fang","family":"Fang","sequence":"additional","affiliation":[{"name":"Structural Heart Disease Center, Fuwai 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China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenli","family":"Gu","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong\u2013Shenzhen Hospital, Shenzhen, China"},{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haochen","family":"Xuan","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong\u2013Shenzhen Hospital, Shenzhen, China"},{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yap-Hang","family":"Chan","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine, The University of Hong Kong\u2013Shenzhen 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