{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T23:00:47Z","timestamp":1777417247043,"version":"3.51.4"},"reference-count":25,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2014,9,10]],"date-time":"2014-09-10T00:00:00Z","timestamp":1410307200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2014,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To assess myocardial performance index measured by conventional Doppler (<jats:styled-content style=\"fixed-case\">MPI<\/jats:styled-content>) and by tissue Doppler imaging (<jats:styled-content style=\"fixed-case\">MPI<\/jats:styled-content>\u2032) at 18\u2009weeks' gestation in monochorionic diamniotic twins for the prediction of twin\u2010to\u2010twin transfusion syndrome (<jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content>).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This was a single\u2010center observational study of 100 uncomplicated monochorionic diamniotic twin pregnancies attending the twin pregnancy clinic at the University Hospital Spedali Civili of Brescia from 2009 to 2012. <jats:styled-content style=\"fixed-case\">MPI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">MPI<\/jats:styled-content>\u2032 were obtained from the left (<jats:styled-content style=\"fixed-case\">LV<\/jats:styled-content>) and right (<jats:styled-content style=\"fixed-case\">RV<\/jats:styled-content>) ventricles of each twin at around 18\u2009weeks of gestation (range, 17\u2009+\u20091 to 19\u2009+\u20094\u2009weeks) and fortnightly thereafter. Cases which later developed <jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content> formed the study group, and the remaining controls were subdivided into those continuing as uncomplicated pregnancies and those which later developed selective intrauterine growth restriction (<jats:styled-content style=\"fixed-case\">sIUGR<\/jats:styled-content>). Data were analyzed by receiver\u2013operating characteristics curve analysis and\u2009univariate and multivariable logistic regression.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of the 100 pregnancies, 88 were controls (84 uncomplicated and four developed <jats:styled-content style=\"fixed-case\">sIUGR<\/jats:styled-content>) and 12 developed <jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content>. <jats:styled-content style=\"fixed-case\">RV\u2010MPI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">LV\u2010MPI<\/jats:styled-content>, and <jats:styled-content style=\"fixed-case\">LV\u2010MPI<\/jats:styled-content>\u2032 were significantly higher in future <jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content> recipients than in controls, while <jats:styled-content style=\"fixed-case\">RV\u2010MPI<\/jats:styled-content>\u2032 was significantly lower in donors. <jats:styled-content style=\"fixed-case\">RV\u2010MPI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">LV\u2010MPI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">LV\u2010MPI<\/jats:styled-content>\u2032 were found to be predictive indicators in pregnancies that had not yet developed <jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content>. Their negative predictive values were\u2009&gt;\u200990%, and their specificities\u2009&gt;\u200980%. The best performing index was <jats:styled-content style=\"fixed-case\">LV\u2010MPI<\/jats:styled-content>\u2032, with a sensitivity of 91.7% and specificity of 88.6%.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Before diagnosis of <jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content>, the cardiac function (as assessed by <jats:styled-content style=\"fixed-case\">MPI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">MPI<\/jats:styled-content>\u2032) of the future donor twin is not grossly abnormal, but that of the recipient is abnormal. We identified cardiac indices predictive of the subsequent development of <jats:styled-content style=\"fixed-case\">TTTS<\/jats:styled-content>, and suggest a possible role of these indices in planning the follow\u2010up of monochorionic diamniotic twin pregnancies. Copyright \u00a9 2014 ISUOG. 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