{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,7]],"date-time":"2025-10-07T23:26:58Z","timestamp":1759879618303},"reference-count":27,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"11","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation"],"published-print":{"date-parts":[[1997,12,2]]},"abstract":"<jats:p>\n            <jats:italic>Background<\/jats:italic>\n            QT dispersion is lower in patients with successful thrombolysis after acute myocardial infarction, suggesting that QT dispersion may be determined by the extent of viable and scarred myocardium.\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Methods and Results<\/jats:italic>\n            To test this hypothesis, QT dispersion was measured in a 12-lead resting ECG in 44 patients with chronic Q-wave myocardial infarction. To assess the extent of viable and scarred myocardium, all patients underwent F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET). In addition, all patients had revascularization of the infarct-related artery and repeated angiography 4 months later. QT dispersion was lower (53\u00b120 versus 94\u00b124 ms,\n            <jats:italic>P<\/jats:italic>\n            &lt;.0001) in patients with evidence of a substantial amount of viable myocardium in the infarct region as demonstrated by PET (average FDG uptake \u226550% of normalized, maximum FDG uptake) than in patients with only minimal residual viability. Average FDG uptake of the infarct region and FDG defect size were significantly related to QT dispersion (\n            <jats:italic>r<\/jats:italic>\n            =.64,\n            <jats:italic>P<\/jats:italic>\n            &lt;.0001;\n            <jats:italic>r<\/jats:italic>\n            =.67,\n            <jats:italic>P<\/jats:italic>\n            &lt;.0001), whereas ejection fraction was not (\n            <jats:italic>r<\/jats:italic>\n            &lt;.1,\n            <jats:italic>P<\/jats:italic>\n            =NS). QT dispersion of \u226470 ms had a sensitivity of 85% and a specificity of 82% to predict viable myocardium in the infarct region. QT dispersion was also lower in patients with improvement of left ventricular function 4 months after revascularization (54\u00b121 versus 88\u00b130 ms,\n            <jats:italic>P<\/jats:italic>\n            =.0003). QT dispersion of \u226470 ms had a sensitivity of 83% and a specificity of 71% to predict improvement of left ventricular function.\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Conclusions<\/jats:italic>\n            QT dispersion is determined by the amount of viable myocardium in the infarct region and may serve as a novel, rapidly available marker of substantial viability in the infarct region of patients with chronic Q-wave myocardial infarction.\n          <\/jats:p>","DOI":"10.1161\/01.cir.96.11.3913","type":"journal-article","created":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T00:41:02Z","timestamp":1339461662000},"page":"3913-3920","update-policy":"http:\/\/dx.doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":67,"title":["QT Dispersion Is Determined by the Extent of Viable Myocardium in Patients With Chronic Q-Wave Myocardial Infarction"],"prefix":"10.1161","volume":"96","author":[{"given":"Christian A.","family":"Schneider","sequence":"first","affiliation":[{"name":"From Klinik III fu\u0308r Innere Medizin (C.A.S., F.M.B., U.S.), Klinik und Poliklinik fu\u0308r Nuklearmedizin (E.V.), Klinik und Poliklinik fu\u0308r Herz- und Thoraxchirurgie (M.H.), and Max-Planck-Institut fu\u0308r neurologische Forschung, Universita\u0308t zu Ko\u0308ln (R.W.), Germany."}]},{"given":"Eberhard","family":"Voth","sequence":"additional","affiliation":[{"name":"From Klinik III fu\u0308r Innere Medizin (C.A.S., F.M.B., U.S.), Klinik und Poliklinik fu\u0308r Nuklearmedizin (E.V.), Klinik und Poliklinik fu\u0308r Herz- und Thoraxchirurgie (M.H.), and Max-Planck-Institut fu\u0308r neurologische Forschung, Universita\u0308t zu Ko\u0308ln (R.W.), Germany."}]},{"given":"Frank M.","family":"Baer","sequence":"additional","affiliation":[{"name":"From Klinik III fu\u0308r Innere Medizin (C.A.S., F.M.B., U.S.), Klinik und Poliklinik fu\u0308r Nuklearmedizin (E.V.), Klinik und Poliklinik fu\u0308r Herz- und Thoraxchirurgie (M.H.), and Max-Planck-Institut fu\u0308r neurologische Forschung, Universita\u0308t zu Ko\u0308ln (R.W.), Germany."}]},{"given":"Michael","family":"Horst","sequence":"additional","affiliation":[{"name":"From Klinik III fu\u0308r Innere Medizin (C.A.S., F.M.B., U.S.), Klinik und Poliklinik fu\u0308r Nuklearmedizin (E.V.), Klinik und Poliklinik fu\u0308r Herz- und Thoraxchirurgie (M.H.), and Max-Planck-Institut fu\u0308r neurologische Forschung, Universita\u0308t zu Ko\u0308ln (R.W.), Germany."}]},{"given":"Rainer","family":"Wagner","sequence":"additional","affiliation":[{"name":"From Klinik III fu\u0308r Innere Medizin (C.A.S., F.M.B., U.S.), Klinik und Poliklinik fu\u0308r Nuklearmedizin (E.V.), Klinik und Poliklinik fu\u0308r Herz- und Thoraxchirurgie (M.H.), and Max-Planck-Institut fu\u0308r neurologische Forschung, Universita\u0308t zu Ko\u0308ln (R.W.), Germany."}]},{"given":"Udo","family":"Sechtem","sequence":"additional","affiliation":[{"name":"From Klinik III fu\u0308r Innere Medizin (C.A.S., F.M.B., U.S.), Klinik und Poliklinik fu\u0308r Nuklearmedizin (E.V.), Klinik und Poliklinik fu\u0308r Herz- und Thoraxchirurgie (M.H.), and Max-Planck-Institut fu\u0308r neurologische Forschung, Universita\u0308t zu Ko\u0308ln (R.W.), Germany."}]}],"member":"276","reference":[{"key":"e_1_3_1_1_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.90.1.8026057"},{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(91)90630-R"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1136\/hrt.73.1.32"},{"key":"e_1_3_1_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0167-5273(96)02732-5"},{"key":"e_1_3_1_5_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.64.6.7296795"},{"key":"e_1_3_1_6_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8167.1994.tb01190.x"},{"key":"e_1_3_1_7_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.74.2.3731420"},{"key":"e_1_3_1_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(83)90002-4"},{"key":"e_1_3_1_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(66)90191-3"},{"key":"e_1_3_1_10_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.76.1.142"},{"key":"e_1_3_1_11_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.91.4.1006"},{"key":"e_1_3_1_12_2","first-page":"537","volume":"21","year":"1994","unstructured":"Voth E, Baer FM, Theissen P, Schneider CA, Sechtem U, Schicha H. 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