{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T14:32:47Z","timestamp":1770906767492,"version":"3.50.1"},"reference-count":27,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circ: Cardiovascular Imaging"],"published-print":{"date-parts":[[2016,6]]},"abstract":"<jats:sec>\n            <jats:title>Background\u2014<\/jats:title>\n            <jats:p>Previously, through the use of computed tomography (CT), it has been proposed that D-shaped versus saddle-shaped mitral annulus (MA) segmentation is more biomechanically appropriate to determine transcatheter mitral valve implantation size and eligibility.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods and Results\u2014<\/jats:title>\n            <jats:p>\n              Forty-one patients with severe mitral regurgitation being considered for transcatheter mitral valve implantation who had undergone cardiac CT and 3-dimensional transesophageal echocardiography (3D-TEE) were retrospectively evaluated. A standardized segmentation protocol for the D-shaped MA was developed using Philips Q-Laboratory mitral valve quantification software. MA dimensions were compared using Spearman\u2019s rank correlation and Bland\u2013Altman analysis. Inter- and intraobserver agreement was quantified by intraclass correlation coefficient and Bland\u2013Altman analysis. Mean age was 77\u00b114 years; 71% male (n=29); mitral regurgitation pathogenesis was functional in 54% (n=22) and myxomatous in 46% (n=19). Mean MA area and circumference by 3D-TEE and CT were 11.3\u00b12.7 versus 11.4\u00b13.0 (\n              <jats:italic>P<\/jats:italic>\n              =0.67) and 124.1\u00b115.6 versus 123.9\u00b115.5 (\n              <jats:italic>P<\/jats:italic>\n              =0.79), respectively, with excellent correlation between modalities (\n              <jats:italic>r<\/jats:italic>\n              =0.84 and\n              <jats:italic>r<\/jats:italic>\n              =0.86;\n              <jats:italic>P<\/jats:italic>\n              &lt;0.0001) and no systematic bias (\u22120.20\u00b11.8 cm\n              <jats:sup>2<\/jats:sup>\n              [\u22123.7 cm\n              <jats:sup>2<\/jats:sup>\n              ; 3.3 cm\n              <jats:sup>2<\/jats:sup>\n              ], 0.37\u00b19 mm [\u221218.0 mm; 17.27 mm]). Mean septal-to-lateral and inter-trigone distances by 3D-TEE and CT were 33.2\u00b14.7 versus 32.5\u00b14.4 (\n              <jats:italic>P<\/jats:italic>\n              =0.24) and 31.7\u00b13.5 versus 32.6\u00b13.6 (\n              <jats:italic>P<\/jats:italic>\n              =0.06), respectively, with good correlation (\n              <jats:italic>r<\/jats:italic>\n              =0.69 and\n              <jats:italic>r<\/jats:italic>\n              =0.71;\n              <jats:italic>P<\/jats:italic>\n              &lt;0.0001) and no systematic bias (0.77\u00b13.8 mm [\u22126.7 mm; 8.2 mm], \u22121.5\u00b13.1 mm [\u22124.6 mm; 7.6 mm]). There was excellent intra- and interobserver agreement according to intraclass correlation coefficients &gt;0.90 for all parameters.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions\u2014<\/jats:title>\n            <jats:p>Similar to cardiac CT, 3D-TEE allows for D-shaped MA segmentation with no systematic difference in MA dimensions between modalities. This study supports the utilization of 3D-TEE as a complementary tool to CT assessment of the D-shaped MA to determine transcatheter mitral valve implantation size.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1161\/circimaging.115.004176","type":"journal-article","created":{"date-parts":[[2016,6,16]],"date-time":"2016-06-16T06:04:55Z","timestamp":1466057095000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":51,"title":["Three-Dimensional Echocardiography Compared With Computed Tomography to Determine Mitral Annulus Size Before Transcatheter Mitral Valve Implantation"],"prefix":"10.1161","volume":"9","author":[{"given":"George J.","family":"Mak","sequence":"first","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philipp","family":"Blanke","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kevin","family":"Ong","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher","family":"Naoum","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher R.","family":"Thompson","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John G.","family":"Webb","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Moss","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Boone","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jian","family":"Ye","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anson","family":"Cheung","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brad","family":"Munt","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonathon","family":"Leipsic","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, Canada."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jasmine","family":"Grewal","sequence":"additional","affiliation":[{"name":"From the St Paul\u2019s Hospital, University of British Columbia, Vancouver, 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