Fig. 3From: Noninvasive assessment of pulmonary arterial capacitance by pulmonary annular motion velocity in children with ventricular septal defectThe relationship between the pulmonary annular motion waveform and systolic pulmonary arterial capacitance (sPAC) in the VSD group. The relationship was evaluated in terms of peak velocity (a–d) and time duration (e–j) in each wave. There are significant correlations between the peak velocities of pulmonary s1′, s2′, e’, and sPAC (a–c). The pulmonary s1′, e’, and a’ wave durations are significantly correlated with sPAC (g, i, and j, respectively). Linear regression lines with 95 % confidence interval (dashed lines) are indicated. sPAC, systolic pulmonary arterial capacitance; ICT, isovolumic contraction time; IRT, isovolumic relaxation timeBack to article page