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The primary aim of the long-term follow-up (SVRIII) was to determine the impact of shunt type on RV function. In this work, we describe the use of CMR in a large cohort follow up from the SVR Trial as a focused study of single ventricle function. The SVRIII protocol included short axis steady-state free precession imaging to assess single ventricle systolic function and flow quantification. There were 313 eligible SVRIII participants and 237 enrolled, ages ranging from 10 to 12.5\u00a0years. 177\/237 (75%) participants underwent CMR. The most common reasons for not undergoing CMR exam were requirement for anesthesia (<jats:italic>n<\/jats:italic>\u2009=\u200914) or ICD\/pacemaker (<jats:italic>n<\/jats:italic>\u2009=\u200911). A total of 168\/177 (94%) CMR studies were diagnostic for RVEF. Median exam time was 54 [IQR 40\u201374] minutes, cine function exam time 20 [IQR 14\u201327] minutes, and flow quantification time 18 [IQR 12\u201325] minutes. There were 69\/177 (39%) studies noted to have intra-thoracic artifacts, most common being susceptibility artifact from intra-thoracic metal. Not all artifacts resulted in non-diagnostic exams. These data describe the use and limitations of CMR for the assessment of cardiac function in a prospective trial setting in a grade-school-aged pediatric population with congenital heart disease. Many of the limitations are expected to decrease with the continued advancement of CMR technology.\n<\/jats:p>","DOI":"10.1007\/s00246-023-03216-8","type":"journal-article","created":{"date-parts":[[2023,7,5]],"date-time":"2023-07-05T05:02:20Z","timestamp":1688533340000},"page":"1454-1461","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Cardiac Magnetic Resonance Imaging to Determine Single Ventricle Function in a Pediatric Population is Feasible in a Large Trial Setting: Experience from the Single Ventricle Reconstruction Trial Longitudinal Follow up"],"prefix":"10.1007","volume":"44","author":[{"given":"Jon","family":"Detterich","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael D.","family":"Taylor","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Timothy C.","family":"Slesnick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"DiLorenzo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anthony","family":"Hlavacek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher Z.","family":"Lam","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shagun","family":"Sachdeva","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sean M.","family":"Lang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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