Clinical and Experimental Pediatrics

The Korean Pediatric Society (대한소아청소년과학회)
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Subclinical left ventricular dysfunction in children after hematopoietic stem cell transplantation for severe aplastic anemia: a case control study using speckle tracking echocardiography

  • Kim, Beom Joon (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Moon, Kyung Pil (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Yoon, Ji-Hong (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Lee, Eun-Jung (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Lee, Jae Young (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kim, Seong Koo (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Lee, Jae Wook (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Chung, Nack Gyun (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Cho, Bin (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kim, Hack Ki (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea)
  • Received : 2015.09.16
  • Accepted : 2015.11.03
  • Published : 2016.04.15
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Abstract

Purpose: Severe aplastic anemia (SAA), a fatal disease, requires multiple transfusion, immunosuppressive therapy, and finally, hematopoietic stem cell transplantation (HSCT) as the definitive treatment. We hypothesized that iron overloading associated with multiple transfusions and HSCT-related complications may adversely affect cardiac function. Left ventricular (LV) function was assessed in children after HSCT for SAA. Methods: Forty-six consecutive patients with a median age of 9.8 years (range, 1.5-18 years), who received HSCT for SAA and who underwent comprehensive echocardiography before and after HSCT, were included in this study. The data of LV functional parameters obtained using conventional echocardiography, tissue Doppler imaging (TDI), and speckle-tracking echocardiography (STE) were collected from pre- and post-HSCT echocardiography. These data were compared to those of 40 age-matched normal controls. Results: In patients, the LV ejection fraction, shortening fraction, end-diastolic dimension, mitral early diastolic E velocity, TDI mitral septal E' velocity, and STE LV longitudinal systolic strain rate (SSR) decreased significantly after HSCT. Compared to normal controls, patients had significantly lower post-HSCT early diastolic E velocity and E/A ratio. On STE, patients had significantly decreased LV deformational parameters including LV longitudinal systolic strain (SS), SSR, and diastolic SR (DSR), and circumferential SS and DSR. Serum ferritin levels showed weak but significant correlations (P<0.05) with LV longitudinal SS and SSR and circumferential SS and DSR. Conclusion: Subclinical LV dysfunction is evident in patients after HSCT for SAA, and was associated with increased iron load. Serial monitoring of cardiac function is mandatory in this population.

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References

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