{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T17:12:51Z","timestamp":1787505171133,"version":"build-2736575974"},"reference-count":14,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T00:00:00Z","timestamp":1770768000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T00:00:00Z","timestamp":1770768000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cathet Cardio Intervent"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Preprocedural screening using transesophageal echocardiography (TEE) and computed tomography (CT) is widely performed in patients undergoing left atrial appendage (LAA) closure (LAAC). However, established methods for accurately predicting procedural device success (DS) remain unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Aims<\/jats:title>\n                    <jats:p>This study aimed to evaluate whether a novel preprocedural CT\u2010based assessment focusing on the landing zone and presence of an internal septum could improve DS prediction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We analyzed 560 patients from a Japanese multicenter registry who underwent LAAC with Watchman FLX (Boston Scientific, USA). Preprocedural CT multiplanar reconstruction measured the diameter of the LAA landing zone (Dland), LAA length (L), and major lobe ostium diameter (Dlobe), if present. Based on these measurements, a ratio calculation (Rcal), defined as L\/(Dland\u2212Dlobe), was used to predict DS. The predictive performance of this ratio was evaluated using receiver operating characteristic (ROC) curve analysis and compared with that of conventional CT\u2010 and TEE\u2010derived depth\u2010to\u2010ostium ratios.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      DS was achieved in 95.5% (535\/560) of patients. The mean Rcal was significantly lower in the failure group than in the success group (0.66\u2009\u00b1\u20090.25 vs. 1.00\u2009\u00b1\u20090.28;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Rcal predicted DS with an area under the ROC curve (AUC) of 0.872 (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). An optimal Rcal cutoff of 0.77 demonstrated 80.0% sensitivity and 83.4% specificity. Rcal showed superior predictive performance compared with CT depth\/ostium ratio (AUC: 0.552) and TEE depth\/ostium ratio (AUC: 0.456).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The novel CT\u2010derived metric, Rcal, which accounts for LAA landing zone dimensions and internal septa, predicts the DS of Watchman FLX. Rcal may improve pre\u2010LAAC patient selection and procedural planning.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ccd.70497","type":"journal-article","created":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T04:24:17Z","timestamp":1770870257000},"page":"1609-1619","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["New Measurements Using Computed Tomography Predict Success of Left Atrial Appendage Closure"],"prefix":"10.1002","volume":"107","author":[{"given":"Ryo","family":"Yamaguchi","sequence":"first","affiliation":[{"name":"Department of Cardiology Toyohashi Heart Center Toyohashi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5210-6382","authenticated-orcid":false,"given":"Masanori","family":"Yamamoto","sequence":"additional","affiliation":[{"name":"Department of Cardiology Toyohashi Heart Center Toyohashi Japan"},{"name":"Department of Cardiology Nagoya Heart Center Nagoya Japan"},{"name":"Department of Cardiology Gifu Heart Center Gifu Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mitsuru","family":"Sago","sequence":"additional","affiliation":[{"name":"Department of Cardiology Toyohashi Heart Center Toyohashi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsuya","family":"Tsunaki","sequence":"additional","affiliation":[{"name":"Department of Cardiology Toyohashi Heart Center Toyohashi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ai","family":"Kagase","sequence":"additional","affiliation":[{"name":"Department of Cardiology Nagoya Heart Center Nagoya Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1402-062X","authenticated-orcid":false,"given":"Takahiro","family":"Tokuda","sequence":"additional","affiliation":[{"name":"Department of Cardiology Nagoya Heart Center Nagoya Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tetsuro","family":"Shimura","sequence":"additional","affiliation":[{"name":"Department of Cardiology Gifu Heart Center Gifu Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2102-033X","authenticated-orcid":false,"given":"Masahiko","family":"Asami","sequence":"additional","affiliation":[{"name":"Division of Cardiology Mitsui Memorial Hospital Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4828-1836","authenticated-orcid":false,"given":"Daisuke","family":"Hachinohe","sequence":"additional","affiliation":[{"name":"Department of Cardiology Sapporo Heart Center, Sapporo Cardio Vascular Clinic Hokkaido 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Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-7994-7594","authenticated-orcid":false,"given":"Toshiaki","family":"Otsuka","sequence":"additional","affiliation":[{"name":"Department of Hygiene and Public Health Nippon Medical School Tokyo Japan"},{"name":"Department of Cardiology Keio University School of Medicine Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6721-1342","authenticated-orcid":false,"given":"Gaku","family":"Nakazawa","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine Kindai University Faculty of Medicine Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yusuke","family":"Watanabe","sequence":"additional","affiliation":[{"name":"Department of Cardiology Teikyo University School of Medicine Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaki","family":"Izumo","sequence":"additional","affiliation":[{"name":"Department of Cardiology St. Marianna University School of Medicine Kawasaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuki","family":"Izumi","sequence":"additional","affiliation":[{"name":"Department of Cardiology St. Marianna University School of Medicine Kawasaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2057-109X","authenticated-orcid":false,"given":"Mike","family":"Saji","sequence":"additional","affiliation":[{"name":"Department of Cardiology Sakakibara Heart Institute Tokyo Japan"},{"name":"Department of Cardiovascular Medicine Toho University Faculty of Medicine Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shingo","family":"Mizuno","sequence":"additional","affiliation":[{"name":"Department of Cardiology Shonan Kamakura 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A.","year":"2017","journal-title":"Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology: Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00380-020-01690-1"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.4244\/EIJ-D-24-00954"}],"container-title":["Catheterization and Cardiovascular 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