{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T07:12:51Z","timestamp":1775805171141,"version":"3.50.1"},"reference-count":37,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["JAHA"],"published-print":{"date-parts":[[2026,2,17]]},"abstract":"<jats:sec xml:lang=\"en\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p xml:lang=\"en\">Risk assessment of patients with syncope does not consider a short PR interval despite its association with increased risk of atrial fibrillation and all\u2010cause mortality. This study aimed to explore the association between the PR interval and all\u2010cause mortality and recurrent syncope in patients admitted to the hospital with syncope.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec xml:lang=\"en\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p xml:lang=\"en\">We included patients with a diagnosis of syncope and an ECG recorded within 24\u2009hours of hospital admission from the Danish Nationwide Electrocardiogram Cohort and divided patients into short (&lt;120 ms), normal (120\u2013200 ms), or long PR interval (&gt;200 ms). Patients with ECG abnormalities or comorbidities influencing the PR interval or outcomes were excluded.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec xml:lang=\"en\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p xml:lang=\"en\">\n                      A total of 52\u2009038 patients were included. Adjusting for age, sex, and relevant covariates the highest hazard ratio (HR) was observed in patients with short PR interval with an HR of 1.50 (95% CI, 1.24\u20131.80,\n                      <jats:italic toggle=\"no\">P<\/jats:italic>\n                      &lt;0.001). A long PR interval did not show an association with all\u2010cause mortality (HR, 1.02 [95% CI, 0.97\u20131.08],\n                      <jats:italic toggle=\"no\">P<\/jats:italic>\n                      =0.3566). Adjusted 5\u2010year cumulative incidence of all\u2010cause mortality was 18% for short PR interval, 14% for normal PR interval, and 13% for long PR interval. Regarding recurrent syncope, a HR of 1.14 (95% CI, 1.09\u20131.20.\n                      <jats:italic toggle=\"no\">P<\/jats:italic>\n                      &lt;0.001) was seen for long PR interval. Adjusted 5\u2010year cumulative incidence of recurrent syncope was 23% in patients with a long PR interval.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec xml:lang=\"en\">\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p xml:lang=\"en\">In patients with syncope, a short PR interval was associated with higher risk of all\u2010cause mortality; however, a long PR interval was associated with increased rate of recurrent syncope.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1161\/jaha.125.043466","type":"journal-article","created":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T11:00:30Z","timestamp":1770807630000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["PR Interval and the Risks of Recurrent Syncope and All\u2010Cause Mortality in Patients Presenting With Syncope"],"prefix":"10.1161","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-8995-940X","authenticated-orcid":false,"given":"Asger","family":"Knudsen","sequence":"first","affiliation":[{"name":"Aalborg University","place":["Aalborg, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8713-1913","authenticated-orcid":false,"given":"Johannes Jan","family":"Struijk","sequence":"additional","affiliation":[{"name":"Aalborg University","place":["Aalborg, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1849-9463","authenticated-orcid":false,"given":"Sam","family":"Riahi","sequence":"additional","affiliation":[{"name":"Aalborg University Hospital","place":["Aalborg, Denmark"]},{"name":"Aalborg University Hospital","place":["Aalborg, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6162-5205","authenticated-orcid":false,"given":"Mikkel Porsborg","family":"Andersen","sequence":"additional","affiliation":[{"name":"Steno Diabetes Center Copenhagen","place":["Herlev, Denmark"]},{"name":"Prehospital Center, Region Zealand","place":["N\u00e6stved, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Helle Collatz","family":"Christensen","sequence":"additional","affiliation":[{"name":"Prehospital Center, Region Zealand","place":["N\u00e6stved, Denmark"]},{"name":"University of Copenhagen","place":["Copenhagen, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2892-6131","authenticated-orcid":false,"given":"Christian","family":"Torp\u2010Pedersen","sequence":"additional","affiliation":[{"name":"Steno Diabetes Center Copenhagen","place":["Herlev, Denmark"]},{"name":"University of Copenhagen","place":["Copenhagen, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristian","family":"Kragholm","sequence":"additional","affiliation":[{"name":"Aalborg University Hospital","place":["Aalborg, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9372-7484","authenticated-orcid":false,"given":"Christoffer","family":"Polcwiartek","sequence":"additional","affiliation":[{"name":"Aalborg University Hospital","place":["Aalborg, Denmark"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J\u00f8rgen K.","family":"Kanters","sequence":"additional","affiliation":[{"name":"University of Copenhagen","place":["Copenhagen, Denmark"]},{"name":"University of California San Francisco","place":["San Francisco, USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Claus","family":"Graff","sequence":"additional","affiliation":[{"name":"Aalborg University","place":["Aalborg, 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