{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T12:15:34Z","timestamp":1778588134039,"version":"3.51.4"},"reference-count":27,"publisher":"S. Karger AG","issue":"1","license":[{"start":{"date-parts":[[2015,11,20]],"date-time":"2015-11-20T00:00:00Z","timestamp":1447977600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2015,11,20]],"date-time":"2015-11-20T00:00:00Z","timestamp":1447977600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Neonatology"],"published-print":{"date-parts":[[2016]]},"abstract":"<jats:p>&lt;b&gt;&lt;i&gt;Background:&lt;\/i&gt;&lt;\/b&gt; There is a paucity of longitudinal data on left ventricular (LV) and right ventricular (RV) function in preterm infants of less than 29 weeks' gestation. &lt;b&gt;&lt;i&gt;Objective:&lt;\/i&gt;&lt;\/b&gt; The aim of this study was to describe changes in tissue Doppler-derived basal longitudinal strain (BLS) and systolic (SRs), early (SRe) and late (SRa) diastolic strain rates in extremely premature infants from birth to 36 weeks postmenstrual age (PMA). &lt;b&gt;&lt;i&gt;Methods:&lt;\/i&gt;&lt;\/b&gt; Echocardiographic assessments were carried out on days 1, 2, 5-7 and at 36 weeks PMA. We assessed the following associations: correlation with systemic vascular resistance (SVR) on day 1, influence of a patent ductus arteriosus (PDA) during days 5-7, and the effect of chronic lung disease (CLD). &lt;b&gt;&lt;i&gt;Results:&lt;\/i&gt;&lt;\/b&gt; In total, 105 infants with a median gestation of 27.1 weeks (IQR 26.0-28.1) and a birthweight of 965 g (IQR 785-1,153) were included. There was an increase in most of the measurements across the four time points. On day 1, there was a weak negative correlation between SVR and LV BLS (r = -0.3, p = 0.01), SVR and septal BLS (r = -0.4, p &lt; 0.001) and SVR and LV SRe (r = -0.4, p = 0.005). On days 5-7, infants with a PDA &gt;1.5 mm had higher LV BLS [-13.0 (2.4) vs. -11.9 (1.9)%, p = 0.03]. At 36 weeks, infants with CLD (n = 28\/47) had lower RV BLS [-26.4 (5.0) vs. -30.7 (5.5)%, p = 0.01] and lower RV SRa [4.2 (1.3) vs. 5.3 (1.9) s&lt;sup&gt;-1&lt;\/sup&gt;, p = 0.04]. &lt;b&gt;&lt;i&gt;Conclusion:&lt;\/i&gt;&lt;\/b&gt; Myocardial function undergoes important longitudinal changes in preterm infants. Left heart strain measurements appear to be weakly influenced by changes in preload and afterload. CLD appears to leave a negative impact on RV function.<\/jats:p>","DOI":"10.1159\/000440940","type":"journal-article","created":{"date-parts":[[2015,11,19]],"date-time":"2015-11-19T22:01:20Z","timestamp":1447970480000},"page":"69-75","source":"Crossref","is-referenced-by-count":44,"title":["Longitudinal Assessment of Left and Right Myocardial Function in Preterm Infants Using Strain and Strain Rate Imaging"],"prefix":"10.1159","volume":"109","author":[{"given":"Adam T.","family":"James","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.D.","family":"Corcoran","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Colm R.","family":"Breatnach","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Orla","family":"Franklin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luc","family":"Mertens","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Afif","family":"El-Khuffash","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2015,11,20]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1111\/echo.12463"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1203\/PDR.0b013e318193f149"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2015.01.024"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2014.08.018"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1016\/j.earlhumdev.2014.09.004"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1111\/echo.12273"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcmg.2013.05.009"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultrasmedbio.2013.03.024"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1007\/s00246-012-0205-z"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1016\/j.mito.2010.12.005"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcmg.2010.09.022"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2011.07.014"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2014.10.003"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0106504"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(06)68615-7"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1038\/jp.2010.14"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2007.01.035"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2014.11.003"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2004.03.027"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1161\/CIRCULATIONAHA.106.647172"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8175.2007.00437.x"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1093\/eurheartj\/ehm444"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2012.07.016"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1016\/j.earlhumdev.2014.03.006"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1016\/j.echo.2013.06.005"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.1152\/ajpheart.00429.2011"},{"key":"ref27","doi-asserted-by":"publisher","DOI":"10.1016\/j.cjca.2015.01.023"}],"container-title":["Neonatology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/440940","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/440940","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/440940","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,23]],"date-time":"2025-04-23T17:55:03Z","timestamp":1745430903000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000440940"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,11,20]]},"references-count":27,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2015,12,1]]},"published-print":{"date-parts":[[2015,12,11]]}},"URL":"https:\/\/doi.org\/10.1159\/000440940","archive":["Portico"],"relation":{},"ISSN":["1661-7800","1661-7819"],"issn-type":[{"value":"1661-7800","type":"print"},{"value":"1661-7819","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,11,20]]}}}