Figure 3From: Reference values for fetal tissue velocity imaging and a new approach to evaluate fetal myocardial function The cardiac state diagram (CSD). Example displaying the cardiac state diagram (CSD) generated from septum, representing the average fetus (a) at 18 weeks of gestation and (b) at term. P1, atrial contraction; P2, pre ejection; P3, ventricular ejection; P4, post ejection; P5, rapid filling; P6, slow filling. Full circle represents one cardiac cycle.Back to article page