{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,25]],"date-time":"2026-07-25T14:58:44Z","timestamp":1784991524929,"version":"3.55.0"},"reference-count":20,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circ: Cardiovascular Interventions"],"published-print":{"date-parts":[[2024,4]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND:<\/jats:title>\n                    <jats:p>Transcatheter edge-to-edge mitral valve (MV) repair (TEER) is an effective treatment for patients with primary mitral regurgitation at prohibitive risk for surgical MV repair (MVr). High-volume MVr centers and high-volume TEER centers have better outcomes than low-volume centers, respectively. However, whether MVr volume predicts TEER outcomes remains unknown. We hypothesized that high-volume MV surgical centers would have superior risk-adjusted outcomes for TEER than low-volume centers.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS:<\/jats:title>\n                    <jats:p>We combined data from the American College of Cardiology\/Society of Thoracic Surgeons Transcatheter Valve Therapy registry and the Society of Thoracic Surgeons adult cardiac surgery database. MVr was defined as leaflet resection or artificial chords with or without annuloplasty and was evaluated as a continuous variable and as predefined categories (&lt;25, 25\u201349, and \u226550 MV repairs\/year). A generalized linear mixed model was used to evaluate risk-adjusted in-hospital\/30-day mortality, 30-day heart failure readmission, and TEER success (mitral regurgitation \u22642+ and gradient &lt;5 mm\u2005Hg).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS:<\/jats:title>\n                    <jats:p>\n                      The study comprised 41\u2005834 patients from 500 sites of which 332 (66.4%) were low, 102 (20.4%) intermediate, and 66 (13.2%) high-volume surgical centers (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt;0.001). TEER success was 54.6% and was not statistically significantly different across MV surgical site volumes (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.4271). TEER mortality at 30 days was 3.5% with no significant difference across MVr volume on unadjusted (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.141) or adjusted (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.071) analysis of volume as a continuous variable. One-year mortality was 15.0% and was lower for higher MVr volume centers when adjusted for clinical and demographic variables (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.027). Heart failure readmission at 1 year was 9.4% and was statistically significantly lower in high-volume centers on both unadjusted (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.017) or adjusted (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.015) analysis.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS:<\/jats:title>\n                    <jats:p>TEER can be safely performed in centers with low volumes of MV repair. However, 1-year mortality and heart failure readmission are superior at centers with higher MVr volume.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1161\/circinterventions.123.013581","type":"journal-article","created":{"date-parts":[[2024,3,4]],"date-time":"2024-03-04T05:06:44Z","timestamp":1709528804000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":16,"title":["Comparison of Transcatheter Edge-to-Edge Mitral Valve Repair for Primary Mitral Regurgitation Outcomes to Hospital Volumes of Surgical Mitral Valve Repair"],"prefix":"10.1161","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9183-1373","authenticated-orcid":true,"given":"Paul A.","family":"Grayburn","sequence":"first","affiliation":[{"name":"Baylor Scott and White Heart Hospital Plano, TX (P.A.G., M.J.M., A.S., R.L.S., M.S.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3148-9158","authenticated-orcid":true,"given":"Michael J.","family":"Mack","sequence":"additional","affiliation":[{"name":"Baylor Scott and White Heart Hospital Plano, TX (P.A.G., M.J.M., A.S., R.L.S., M.S.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pratik","family":"Manandhar","sequence":"additional","affiliation":[{"name":"Duke Clinical Research Center, Durham, NC (P.M., A.S.K., S.V.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4151-5185","authenticated-orcid":true,"given":"Andrzej S.","family":"Kosinski","sequence":"additional","affiliation":[{"name":"Duke Clinical Research Center, Durham, NC (P.M., A.S.K., S.V.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4275-8066","authenticated-orcid":true,"given":"Anna","family":"Sannino","sequence":"additional","affiliation":[{"name":"Baylor Scott and White Heart Hospital Plano, TX (P.A.G., M.J.M., A.S., R.L.S., M.S.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"II","given":"Robert L.","family":"Smith","sequence":"additional","affiliation":[{"name":"Baylor Scott and White Heart Hospital Plano, TX (P.A.G., M.J.M., A.S., R.L.S., M.S.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4907-1825","authenticated-orcid":true,"given":"Molly","family":"Szerlip","sequence":"additional","affiliation":[{"name":"Baylor Scott and White Heart Hospital Plano, TX (P.A.G., M.J.M., A.S., R.L.S., M.S.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1599-2957","authenticated-orcid":true,"given":"Sreekanth","family":"Vemulapalli","sequence":"additional","affiliation":[{"name":"Duke Clinical Research Center, Durham, NC (P.M., A.S.K., 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