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Among 169 patients with HFpEF (91 no TR, 44 mild TR, 34\u2009\u2265\u2009moderate TR), older age and atrial fibrillation were more common in patients with greater TR severity. Right heart remodelling and dysfunction were more frequently observed with greater TR severity, particularly in the right atrium, along with stepwise increases in right atrial (RA) pressure and interventricular septal flattening, and decreases in cardiac output (CO). During exercise, TR severity frequently worsened, and over half of the patients with moderate TR at rest displayed severe TR during exercise, accompanied by profound RA dilatation, reduced RA reservoir strain, increased septal flattening, and more severely impaired CO reserve. Abnormalities in tricuspid annular motion and ventricular interaction were amplified by exercise with greater TR, but exercise pulmonary vascular pressures did not differ across groups. Patients with \u2265\u2009moderate TR during exercise displayed higher event rates (hazard ratio 2.85, 95% confidence interval 1.18\u20136.85), but patients with mild TR had similar prognosis as those without TR in adjusted models.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Tricuspid regurgitation in HFpEF is related to advanced RA myopathy and often worsens during exercise leading to dynamic right-sided heart failure, exaggerated ventricular interaction, impaired CO reserve, and increased risk for adverse outcomes. These data emphasize the clinical importance of exercise evaluation and call for further study of novel treatments in those with significant resting and provocable TR.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ejhf.70050","type":"journal-article","created":{"date-parts":[[2025,9,22]],"date-time":"2025-09-22T07:35:59Z","timestamp":1758526559000},"page":"3155-3169","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Dynamic Tricuspid Regurgitation in Heart Failure with Preserved Ejection Fraction"],"prefix":"10.1093","volume":"27","author":[{"given":"Tomonari","family":"Harada","sequence":"first","affiliation":[{"name":"Department of Cardiovascular Medicine, Mayo Clinic , Rochester, MN ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yogesh N.V.","family":"Reddy","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine, Mayo Clinic , 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,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shunichi","family":"Doi","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine, Mayo Clinic , Rochester, MN ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsuro","family":"Ibe","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine, Mayo Clinic , Rochester, MN ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mackram F.","family":"Eleid","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine, Mayo Clinic , Rochester, MN ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sorin V.","family":"Pislaru","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Medicine, Mayo Clinic , Rochester, MN ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rebecca 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