CV disease is the major cause of death in patients with CKD. Recently, CMR imaging emerges as a complementary method providing advantages in cardiac assessment; however, data on CMR in pediatric CKD are scarce. We performed CMR in 15 children: two with CKD, six on peritoneal dialysis, seven on hemodialysis, and in 18 children 5.1 (0.4-15.4) yr after kidney Tx. Eight children underwent CMR six months before and after Tx. Results are presented as mean z score ± SD. LV EF was higher and in the normal range in Tx patients compared with CKD (-0.3 ± 1 vs. -2.1 ± 1.6, respectively, p < 0.05), whereas RV EF was similar (-0.9 ± 1.4 vs. -0.9 ± 1.8, p = n.s.). End-diastolic and end-systolic LV volume index (0 ± 1.7 vs. 2.1 ± 3.1; 0.2 ± 1.2 vs. 3.1 ± 3.7, both p < 0.05) and LV mass index (1.4 ± 1.5 vs. 3.4 ± 2.9, p < 0.05) were lower in Tx children. All parameters improved in the eight children after Tx. In conclusion, our CMR analysis suggests marked improvement of cardiac function and morphology in children after kidney Tx. CMR might be an appropriate complementary method for measuring detailed cardiac status in children with CKD.

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