Figure 4From: Fetal cardiac muscle contractility decreases with gestational age: a color-coded tissue velocity imaging study The atrioventricular (AV) plane displacement increased with gestational age (r = 0.825, p < 0.001) (a), and left ventricular (LV) length (r = 0.851, p < 0.001) (b), while the longitudinal shortening decreased as pregnancy advanced (r = 0.778, p < 0.001) (c). Figures a-c display linear regression analysis with 95% confidence interval.Back to article page