{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T22:54:55Z","timestamp":1783464895085,"version":"3.55.0"},"reference-count":27,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"22","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["JAHA"],"published-print":{"date-parts":[[2020,11,17]]},"abstract":"<jats:sec xml:lang=\"en\">\n            <jats:title>Background<\/jats:title>\n            <jats:p xml:lang=\"en\">The clinical significance of conduction disturbances after transcatheter aortic valve implantation has been described; however, little is known about the influence of baseline ECGs in the prognosis of these patients. Our aim was to study the influence of baseline ECG parameters, including interatrial block (IAB), in the prognosis of patients treated with transcatheter aortic valve implantation.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec xml:lang=\"en\">\n            <jats:title>Methods and Results<\/jats:title>\n            <jats:p xml:lang=\"en\">\n              The BIT (Baseline Interatrial Block and Transcatheter Aortic Valve Implantation) registry included 2527 patients with aortic stenosis treated with transcatheter aortic valve implantation. A centralized analysis of baseline ECGs was performed. Patients were divided into 4 groups: normal P wave duration (&lt;120\u00a0ms); partial IAB (P wave duration \u2265120\u00a0ms, positive in the inferior leads); advanced IAB (P wave duration \u2265120\u00a0ms, biphasic [+\/\u2013] morphology in the inferior leads); and nonsinus rhythm (atrial fibrillation\/flutter and paced rhythm). The mean age of patients was 82.6\u00b19.8\u00a0years and 1397 (55.3%) were women. A total of 960 patients (38.0%) had a normal P wave, 582 (23.0%) had partial IAB, 300 (11.9%) had advanced IAB, and 685 (27.1%) presented with nonsinus rhythm. Mean follow\u2010up duration was 465\u00b1171\u00a0days. Advanced IAB was the only independent predictor of all\u2010cause mortality (hazard ratio [HR], 1.48; 95% CI, 1.10\u20131.98 [\n              <jats:italic>P<\/jats:italic>\n              =0.010]) and of the composite end point (death\/stroke\/new atrial fibrillation) (HR, 1.51; 95% CI, 1.17\u20131.94 [\n              <jats:italic>P<\/jats:italic>\n              =0.001]).\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec xml:lang=\"en\">\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p xml:lang=\"en\">Baseline ECG characteristics influence the prognosis of patients with aortic stenosis treated with transcatheter aortic valve implantation. Advanced IAB is present in about an eighth of patients and is associated with all\u2010cause death and the composite end point of death, stroke, and new atrial fibrillation during follow\u2010up.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1161\/jaha.120.017624","type":"journal-article","created":{"date-parts":[[2020,11,3]],"date-time":"2020-11-03T10:06:57Z","timestamp":1604398017000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":17,"title":["Baseline ECG and Prognosis After Transcatheter Aortic Valve Implantation: The Role of Interatrial Block"],"prefix":"10.1161","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7914-9788","authenticated-orcid":false,"given":"Lourdes","family":"Vicent","sequence":"first","affiliation":[{"name":"Department of Cardiology Hospital General Universitario Gregorio Mara\u00f1\u00f3n CIBERCV Madrid Spain"},{"name":"Department of Cardiology Hospital General Universitario 12 de Octubre CIBERCV Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clara","family":"Fern\u00e1ndez\u2010Cord\u00f3n","sequence":"additional","affiliation":[{"name":"Department of Cardiology Hospital General Universitario Gregorio Mara\u00f1\u00f3n CIBERCV Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3438-8907","authenticated-orcid":false,"given":"Luis","family":"Nombela\u2010Franco","sequence":"additional","affiliation":[{"name":"Cardiovascular Institute Hospital Clinico San Carlos, IdISSC Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis Alberto","family":"Escobar\u2010Robledo","sequence":"additional","affiliation":[{"name":"Department of Cardiology Hospital de la Santa Creu i Sant Pau. 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