{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,2]],"date-time":"2026-11-02T17:32:29Z","timestamp":1793640749085,"version":"4.5.1"},"reference-count":20,"publisher":null,"issue":"11","license":[{"start":{"date-parts":[[2020,12,3]],"date-time":"2020-12-03T00:00:00Z","timestamp":1606953600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/lib.ossn.ru\/jour\/about\/editorialPolicies#openAccessPolicy"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Kardiologiia"],"abstract":"<jats:p>\n                    <jats:italic>Aim\u00a0\u00a0\u00a0\u00a0\u00a0<\/jats:italic>\n                    To identify clinical, echocardiographic, and angiographic factors related with an increase in the frontal QRS-T angle (fQRS-T) and the spatial QRS-T angle (sQRS-T) in patients with inferior myocardial infarction.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Material and methods\u00a0<\/jats:italic>\n                    The study included 128 patients aged (median [25\n                    <jats:sup>th<\/jats:sup>\n                    percentile; 75\n                    <jats:sup>th<\/jats:sup>\n                    percentile]) 59.5 [51.5; 67.0] years diagnosed with inferior wall acute myocardial infarction. fQRS-T was calculated as a module of difference between the QRS axis and the \u0422 axis in the frontal plane. sQRS-T was calculated by a synthesized vectorcardiogram as a spatial angle between the QRS and \u0422 integral vectors.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Results<\/jats:italic>\n                    The fQRS-T for the group was 54.0 [18; 80] and sQRS-T was 80.1 [53; 110]. The correlation coefficient for fQRS-T and sQRS-T values was 0.42 (p&lt;0.001). Both fQRS-T &gt;80\u00b0 and sQRS-T &gt;110\u00b0 compared to their lower values were associated with a higher frequency of history of postinfarction cardiosclerosis (44% and 12\u200a%, respectively; p&lt;0.05), a lower left ventricular ejection fraction (51 [47; 60]% at fQRS-T &gt;80\u00b0 and 55 [50; 60]% at fQRS-T &lt;80\u00b0 (p&lt;0,05); 49 [44; 57]% at sQRS-T &gt;110\u00b0 and 57 [51; 60] % at sQRS-T &lt;110\u00b0 (p&lt;0.01); more frequent development of acute heart failure (16 and 2\u200a%, respectively; p&lt;0.05); and early postinfarction angina (13 and 2\u200a%, respectively; p&lt;0.05). The increased fQRS-T was associated with a higher incidence of damage to the circumflex artery (45 and 20\u200a%, respectively; p&lt;0.05). The increased sQRS-T was associated with a history of arterial hypertension (97 and 76\u200a%, respectively; p&lt;0.05), chronic heart failure (22 and 3\u200a%, respectively; p&lt;0.05), chronic kidney disease (19 and 4\u200a%, respectively; p&lt;0.05), and a larger myocardial lesion (mean number of damaged segments by echocardiography was 3.8 [2; 6] at sQRS-T &gt;110\u00b0 and 2.6 [1; 4] at sQRS-T &lt;110\u00b0; p&lt;0.01). sQRS-T was significantly greater in multivascular damage (87 [68; 121]\u00b0 than in one- or two-vascular damage (72 [51; 100]\u00b0; p&lt;0.05). sQRS-T values were significantly lower with spontaneous reperfusion (66 [29; 79] than without spontaneous reperfusion (77 [55; 115]\u00b0; p&lt;0.05).\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Conclusion\u00a0\u00a0\u00a0\u00a0\u00a0<\/jats:italic>\n                    In patients after inferior wall acute myocardial infarction, increases in fQRS-T and sQRS-T were associated with more severe damage of coronary vasculature, decreased left ventricular ejection fraction, and more severe course of disease.\n                  <\/jats:p>","DOI":"10.18087\/cardio.2020.11.n1295","type":"journal-article","created":{"date-parts":[[2021,1,25]],"date-time":"2021-01-25T03:30:07Z","timestamp":1611545407000},"page":"76-83","source":"Crossref","is-referenced-by-count":5,"title":["Factors Associated with the Increase in Spatial and Frontal QRS-T Angles in Patients with Inferior Myocardial Infarction"],"prefix":"10.68900","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5543-7184","authenticated-orcid":true,"given":"T. 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S.","family":"Zhukova","sequence":"additional","affiliation":[{"name":"National Medical Research Center of Cardiology, Ministry of Healthcare Russian Federation, Moscow"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T. S.","family":"Sukhinina","sequence":"additional","affiliation":[{"name":"National Medical Research Center of Cardiology, Ministry of Healthcare Russian Federation, Moscow"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N. A.","family":"Barysheva","sequence":"additional","affiliation":[{"name":"National Medical Research Center of Cardiology, Ministry of Healthcare Russian Federation, Moscow"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I. 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