Results: In patients group, the peak rotation of posterior, inferior, and postsept wall in basal was higher
(P ≤ 0.05) and LV twist was also higher (P ≤ 0.05) than healthy controls. There were no significant differences
between 2 groups in the peak rotation of the other 9 segments and left ventricular ejection
fraction. Different from the control group, the time to peak rotation of the 6 segments in basal were
delayed and the global rotation of the base was delayed (P ≤ 0.05) in ventricular septal defect group.