Assessment of longitudinal myocardial function in children with dilated cardiomypathy by velocity vector imaging

  • Shu-wen Zhong, Department of Pediatric Cardiology, Shanghai Children’s Medical Center, Shanghai Jiaotong University, Shanghai, China
  • Yu-qi Zhang, Department of Pediatric Cardiology, Shanghai Children’s Medical Center, Shanghai Jiaotong University, Shanghai, China
  • Dr Kun Sun, Department of Pediatric Cardiology, Shanghai Children’s Medical Center, China
  • Li-jun Chen, Department of Pediatric Cardiology, Shanghai Children’s Medical Center, Shanghai Jiaotong University, Shanghai, China

    • Objective: To assess the left ventricular longitudinal systolic function in children with dilated cardiomyopathy by syno Velocity Vector Imaging.
    Method: LV images (apical four-chamber view, high frame capture) frome 23 DCM children and 20 normal children were stored and analyzed . Segmental ejection fractions were determined at basal, middle and apical segments of LV free wall and ventricular septum by velocity vector imaging. LV volume was also automatically obtained throughout the cardiac cycle. These parameters of the two groups were compared .
    Result: All the parameters of the DCM were significantly lower than the those of the normal group(P<0.001).
    Conclusion: VVI provide a useful and noninvasive method for evaluating regional cardiac function.

    Segmental EF(%) Base of sepum Middle of septum apex of septum Base of LV Middle of LV Apex of LV Vmax(ml) Vmin(ml)
    DCM 26.4±10.8 32.4±12.1 39.9±12.7 27.3±13.0 26.9±12.6 26.9±11.8 107.4±80.0 66.0±26.6
    Normal 47.7±7.3 49.3±6.3 46.0±8.5 43.6±6.2 47.4±7.8 48.4±11.5 81.9±67.8 38.3±19.8