{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T01:02:02Z","timestamp":1779152522764,"version":"3.51.4"},"reference-count":41,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2019,5,13]],"date-time":"2019-05-13T00:00:00Z","timestamp":1557705600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Echocardiography"],"published-print":{"date-parts":[[2019,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>Myocardial bridging (<jats:styled-content style=\"fixed-case\">MB<\/jats:styled-content>) can cause myocardial ischemia, myocardial infarction, or even sudden cardiac death. We aimed to evaluate the left ventricular function in patients with<jats:styled-content style=\"fixed-case\">MB<\/jats:styled-content>of the left anterior descending coronary artery (<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>) using longitudinal strain (<jats:styled-content style=\"fixed-case\">LS<\/jats:styled-content>) measured by two\u2010dimensional speckle tracking echocardiography.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We enrolled 46 subjects with<jats:styled-content style=\"fixed-case\">MB<\/jats:styled-content>in the<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>diagnosed by coronary angiography. Patients were categorized into two groups according to the severity of tunneled artery stenosis: &lt;50% as group I (23 patients) and \u226550% as group<jats:styled-content style=\"fixed-case\">II<\/jats:styled-content>(23 patients). Twenty\u2010five gender\u2010 and age\u2010matched subjects without<jats:styled-content style=\"fixed-case\">MB<\/jats:styled-content>confirmed by coronary angiography or with normal results on treadmill exercise test were included as controls. Two\u2010dimensional strain software was applied to measure the territories systolic average peak<jats:styled-content style=\"fixed-case\">LS<\/jats:styled-content>of the<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>coronary artery (<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>), right coronary artery (<jats:styled-content style=\"fixed-case\">RCA<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>), and left circumflex coronary artery (<jats:styled-content style=\"fixed-case\">LCX<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>) and to measure the global systolic peak<jats:styled-content style=\"fixed-case\">LS<\/jats:styled-content>of left ventricle (<jats:styled-content style=\"fixed-case\">LV<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">GPLS<\/jats:styled-content>).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The ratio of mitral peak early (E) and late (A) filling velocity (E\/A) and the average mitral annular velocity (e\u2032) were lower, and the mitral E\/e\u2032 ratio was higher in group<jats:styled-content style=\"fixed-case\">II<\/jats:styled-content>than in group I and controls (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.05).<jats:styled-content style=\"fixed-case\">LV<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">GPLS<\/jats:styled-content>and<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>were significantly less negative in group<jats:styled-content style=\"fixed-case\">II<\/jats:styled-content>than in group I and controls (<jats:styled-content style=\"fixed-case\">LV<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">GPLS<\/jats:styled-content>: \u221219.77\u00a0\u00b1\u00a01.60% vs \u221221.10\u00a0\u00b1\u00a01.91% and \u221221.76\u00a0\u00b1\u00a01.23%;<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>: \u221219.24\u00a0\u00b1\u00a02.22% vs \u221222.00\u00a0\u00b1\u00a02.22% and \u221222.74\u00a0\u00b1\u00a01.82%,<jats:italic>P\u00a0<\/jats:italic>&lt;<jats:italic>\u00a0<\/jats:italic>0.001). The systolic compression severity of the tunneled artery was significantly correlated with<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>(<jats:italic>r<\/jats:italic>\u00a0=\u00a0\u22120.56,<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.001), but less strongly correlated with<jats:styled-content style=\"fixed-case\">LV<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">GPLS<\/jats:styled-content>(<jats:italic>r<\/jats:italic>\u00a0=\u00a0\u22120.40,<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.05). The area under the curves of<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>was larger than that of<jats:styled-content style=\"fixed-case\">LV<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">GPLS<\/jats:styled-content>; a cutoff value for<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>of \u221221.68% had 91.3% sensitivity and 73.9% specificity for detection of \u226550% of the tunneled artery stenosis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In patients with \u226550% systolic narrowing of the tunneled artery, left ventricular systolic function and diastolic function were impaired, and the<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">TPLS<\/jats:styled-content>is an excellent predictor of \u226550% systolic narrowing of the tunneled artery in patients with<jats:styled-content style=\"fixed-case\">MB<\/jats:styled-content>of the<jats:styled-content style=\"fixed-case\">LAD<\/jats:styled-content>.<\/jats:p><\/jats:sec>","DOI":"10.1111\/echo.14357","type":"journal-article","created":{"date-parts":[[2019,5,14]],"date-time":"2019-05-14T04:50:22Z","timestamp":1557809422000},"page":"1066-1073","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Longitudinal strain measured by two\u2010dimensional speckle tracking echocardiography to evaluate left ventricular function in patients with myocardial bridging of the left anterior descending coronary artery"],"prefix":"10.1111","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7002-6044","authenticated-orcid":false,"given":"Minping","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Ultrasound Diagnosis The 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