{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T08:45:26Z","timestamp":1785746726566,"version":"3.56.0"},"reference-count":14,"publisher":"Akademiai Kiado Zrt.","issue":"31","content-domain":{"domain":["www.akjournals.com"],"crossmark-restriction":true},"short-container-title":["OH"],"published-print":{"date-parts":[[2026,8,2]]},"abstract":"<jats:p>\n                    Az angina alatti U-hull\u00e1m-v\u00e1ltoz\u00e1sokat gyakran nem ismerik fel, pedig az U-hull\u00e1m\n                    polarit\u00e1sv\u00e1ltoz\u00e1sa lehet ak\u00e1r az egyed\u00fcli jele a myocardialis ischaemi\u00e1nak. A\n                        V\n                    <jats:sub>1\u20134<\/jats:sub>\n                    -elvezet\u00e9sekben a pozit\u00edv U-hull\u00e1m angina alatti megjelen\u00e9se\n                    posterobasalis ischaemi\u00e1ra \u00e9s CX vagy RCA coronariabetegs\u00e9g kritikus sz\u0171k\u00fclet\u00e9re\n                    utal. A szerz\u0151k erre mutatnak k\u00e9t p\u00e9ld\u00e1t. Orv Hetil. 2026; 167(31):\n                    1248\u20131252.\n                  <\/jats:p>","DOI":"10.1556\/650.2026.33575","type":"journal-article","created":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T06:51:31Z","timestamp":1785739891000},"page":"1248-1252","update-policy":"https:\/\/doi.org\/10.1556\/policypage.crossmark.crossref.2","source":"Crossref","is-referenced-by-count":0,"title":["Angina induk\u00e1lta mark\u00e1ns, pozit\u00edv U-hull\u00e1mok a V1\u20133-elvezet\u00e9sekben"],"prefix":"10.1556","volume":"167","author":[{"given":"J\u00e1nos","family":"Tomcs\u00e1nyi","sequence":"first","affiliation":[{"name":"Beteg\u00e1pol\u00f3 Irgalmasrend Budai Irgalmasrendi K\u00f3rh\u00e1za, Kardiol\u00f3gia Budapest, \u00c1rp\u00e1d fejedelem u. 7. 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The negative U wave:\n                    a pathogenetic enigma but a useful often overlooked bedside diagnostic and\n                    prognostic clue in ischaemic heart disease. Clin Cardiol. 2004; 27: 674-677.\n                        https:\/\/doi.org\/10.1002\/clc.4960271203","DOI":"10.1002\/clc.4960271203"},{"key":"R3","doi-asserted-by":"crossref","unstructured":"Gerson MC, Phillips JF, Morris SN, et al. Exercise-induced U-wave\n                    inversion as a marker of stenosis of the left anterior descending coronary\n                    artery. Circulation 1979; 60: 1014-1020.\n                        https:\/\/doi.org\/10.1161\/01.CIR.60.5.1014","DOI":"10.1161\/01.CIR.60.5.1014"},{"key":"R4","doi-asserted-by":"crossref","unstructured":"Kishida H, Cole JS, Surawicz B. Negative U wave. A highly specific\n                    but poorly understood sign of heart disease. Am J Cardiol. 1982; 49: 2030-2036.\n                        https:\/\/doi.org\/10.1016\/0002-9149(82)90225-9","DOI":"10.1016\/0002-9149(82)90225-9"},{"key":"R5","doi-asserted-by":"crossref","unstructured":"Tomcs\u00e1nyi J, Soml\u00f3i M, Wettstein A, et al. Negative U waves in\n                    coronary disease. Am Heart J. 1995; 130: 1315-1317.\n                        https:\/\/doi.org\/10.1016\/0002-8703(95)90177-9","DOI":"10.1016\/0002-8703(95)90177-9"},{"key":"R6","doi-asserted-by":"crossref","unstructured":"Kataoka H, Yano S. Associations between different status of\n                    myocardial ischemia and ischemia-related negative or positive epicardial\n                    U-waves: observations during coronary angioplasty. J Electrocardiol. 1999; 32:\n                    293-303.\n                    https:\/\/doi.org\/10.1016\/S0022-0736(99)90000-6","DOI":"10.1016\/S0022-0736(99)90000-6"},{"key":"R7","doi-asserted-by":"crossref","unstructured":"Kataoka H, Yano S, Tamura A, et al. Reflection of epicardial U-wave\n                    changes in surface inferior electrocardiograms during inferoposterior or\n                    anterior wall myocardial ischemia. Am J Cardiol. 1997; 79: 194-197.\n                        https:\/\/doi.org\/10.1016\/S0002-9149(96)00713-8","DOI":"10.1016\/S0002-9149(96)00713-8"},{"key":"R8","doi-asserted-by":"crossref","unstructured":"Chikamori T, Yamada M, Takata J, et al. Exercise-induced prominent U\n                    waves as a marker of significant narrowing of the left circumflex or right\n                    coronary artery. Am J Cardiol. 1994; 74: 495-499.\n                        https:\/\/doi.org\/10.1016\/0002-9149(94)90912-1","DOI":"10.1016\/0002-9149(94)90912-1"},{"key":"R9","doi-asserted-by":"crossref","unstructured":"Tomcs\u00e1nyi J, Tomcs\u00e1nyi K, B\u00f3zsik B. Prominent positive U-waves\n                    during angina. Am J Med. 2026; 139: 306-308.\n                        https:\/\/doi.org\/10.1016\/j.amjmed.2025.11.017","DOI":"10.1016\/j.amjmed.2025.11.017"},{"key":"R10","doi-asserted-by":"crossref","unstructured":"Holmes K, Drone E, Lizardo K, et al. New electrocardiographic\n                    changes as predictors of acute coronary interventions in the emergency\n                    department: a retrospective observational study. 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[Hungarian]\n                    https:\/\/doi.org\/10.1556\/650.2019.31537","DOI":"10.1556\/650.2019.31537"},{"key":"R13","doi-asserted-by":"crossref","unstructured":"Tomcs\u00e1nyi J, Sas B, Kelemen-Hunor G, et al. De Winter sign with\n                    complete atrioventricular block and right coronary occlusion in non-ST-elevation\n                    myocardial infarction. [De Winter-jel komplett atrioventricularis blokkal \u00e9s\n                    jobb koszor\u00fa\u00e9r-elz\u00e1r\u00f3d\u00e1ssal ST-elev\u00e1ci\u00f3val nem j\u00e1r\u00f3 sz\u00edvinfarktusban.] Orv\n                    Hetil. 2024; 165: 1794-1797. [Hungarian]\n                        https:\/\/doi.org\/10.1556\/650.2024.33170","DOI":"10.1556\/650.2024.33170"},{"key":"R14","doi-asserted-by":"crossref","unstructured":"J\u00e1nosi A, Csat\u00f3 G, Ferenci T, et al. Clinical and scientific value\n                    of the Hungarian Myocardial Infarction Registry. 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