Between June 2002 and April 2012, 113 patients with transannular repair of TOF underwent magnetic resonance imaging (MRI). Patients were divided into a limited RV-tomy group (n聽=聽39) and a conventional RV-tomy group (n聽=聽74). Thirty-nine patients from each group were matched for comparison using propensity scores. The MRI parameters of the 2 groups were compared.
The interval between TOF repair and MRI examination was shorter in the limited RV-tomy group (limited, 12.7 卤 3.8 years; conventional, 17.2 卤 4.7 years; P聽<聽.001). Indexed RV volumes were similar between the groups (RV end-diastolic volume index: 149 卤 31 mL/m2 vs 152 卤 42 mL/m2; P聽=聽.704. RV end-systolic volume index: 70 卤 24 mL/m2 vs 77 卤 38 mL/m2; P聽=聽.313). There was no difference in the RV ejection fraction between the groups (54% 卤 9% vs 51% 卤 9%; P聽=聽.160). Propensity score-matched comparison also revealed no differences in RV volume and function.
No long-term benefits of limited RV-tomy were demonstrated compared with conventional RV-tomy in patients who underwent transannular TOF repair, at least in terms of RV volume and function. Further studies are necessary to define the role of limited RV-tomy in patients who undergo transannular TOF repair.
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