{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T08:33:34Z","timestamp":1777451614373,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","issue":"2","license":[{"start":{"date-parts":[[2016,11,8]],"date-time":"2016-11-08T00:00:00Z","timestamp":1478563200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/3.0\/"},{"start":{"date-parts":[[2016,11,8]],"date-time":"2016-11-08T00:00:00Z","timestamp":1478563200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Med Princ Pract"],"published-print":{"date-parts":[[2017]]},"abstract":"<b><i>Objective:<\/i><\/b> The present study was undertaken to investigate the prognostic value of the frontal planar QRS-T angle in patients without angiographically apparent coronary atherosclerosis. <b><i>Subjects and Methods:<\/i><\/b> Three hundred and seven patients with normal coronary arteries on coronary angiography were included. The absolute difference between the frontal QRS- and T-wave axes was defined as the frontal planar QRS-T angle, and patients were divided into 3 subgroups based on the frontal planar QRS-T angle (<45, 45-90, and >90\u00b0). Demographic, clinical, laboratory, and angiographic data were compared between groups. Based on the regression analysis results, patients were recategorized into 4 groups according to their luminal calibers of left main coronary artery (LMCA) and history of hypertension (HT) (nonhypertensive LMCA \u22644.13 mm, nonhypertensive LMCA >4.13 mm, hypertensive LMCA \u22644.13 mm, and hypertensive LMCA >4.13 mm). <b><i>Results:<\/i><\/b> The median value of the frontal planar QRS-T angle of all participants was 38\u00b0. Subjects with the widest frontal planar QRS-T angle were older (<i>p<\/i> = 0.027), were hypertensive (<i>p<\/i> = 0.001), and had higher corrected QT values (<i>p<\/i> = 0.001). Patients with the widest frontal planar QRS-T angle had larger LMCA and left anterior descending coronary artery diameters compared to subjects with a normal and borderline frontal QRS-T angle (<i>p<\/i> = 0.004 and <i>p<\/i> = 0.028, respectively). Corrected QT, HT, and LMCA diameter were found as independent predictors of the frontal planar QRS-T angle. Subjects with HT and a larger luminal caliber of LMCA had the widest frontal planar QRS-T angle. <b><i>Conclusion:<\/i><\/b> Patients with a history of HT and a larger luminal caliber of LMCA had the widest frontal planar QRS-T angle. Since HT-induced electrophysiological changes are still not well established and we observed that changes in the luminal caliber of coronary arteries are associated with an abnormal frontal QRS-T angle, the frontal QRS-T angle could serve as a marker of ventricular repolarization heterogeneity in hypertensive patients in addition to keeping track of arrhythmic events, even before overt disease.<\/jats:p>","DOI":"10.1159\/000453267","type":"journal-article","created":{"date-parts":[[2016,11,8]],"date-time":"2016-11-08T22:01:45Z","timestamp":1478642505000},"page":"125-131","source":"Crossref","is-referenced-by-count":20,"title":["The Value of Frontal Planar QRS-T Angle in Patients without Angiographically Apparent Atherosclerosis"],"prefix":"10.1159","volume":"26","author":[{"given":"Mutlu","family":"Gungor","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Murat","family":"Celik","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9112-381X","authenticated-orcid":false,"given":"Emre","family":"Yalcinkaya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alper Tolga","family":"Polat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Uygar Cagdas","family":"Yuksel","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Erkan","family":"Yildirim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Serdar","family":"Firtina","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Baris","family":"Bugan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ali Can","family":"Ozer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2016,11,8]]},"container-title":["Medical Principles and Practice"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/453267","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/453267","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/453267","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,23]],"date-time":"2025-04-23T17:00:35Z","timestamp":1745427635000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000453267"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,11,8]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2017,3,17]]},"published-print":{"date-parts":[[2017,3,22]]}},"URL":"https:\/\/doi.org\/10.1159\/000453267","archive":["Portico"],"relation":{},"ISSN":["1011-7571","1423-0151"],"issn-type":[{"value":"1011-7571","type":"print"},{"value":"1423-0151","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,11,8]]}}}