Figures:
Figure 1 : Apical 4-chamber view at 24 weeks of pregnancy showing the accessory chamber (AC) and the main chamber (MC) of the left ventricle separated by abnormal muscle bundle. LA: left atria, RA: right atria; RV: right ventricle.
Figure 2: Apical view showing that the main chamber (MC) of the left ventricle was in connection with mitral and aortic valves. AC: Accessory chamber; Ao: ascending aorta; LA: left atria; RV: right ventricle.
Figure 3: M-mode echocardiogram demonstrating that the accessory chamber (AC) of the left ventricle contracted synchronously with the main chamber (MC) and the right ventricle (RV).
Figure 4: M-mode color doppler showing bidirectional flow across the communication between accessory chamber (AC) and main chamber (MC) of the left ventricle. During diastole (D) red color indicates filling of the AC. During systole (S), blue color indicates draining of the AC towards the MC.
Figure 5: Postnatal subcostal view at 4 days of life confirming prenatal finding. AC: accessory chamber, LA: left atria; MC: main chamber; RA: right atria.
Figure 6 : Postnatal long axis parasternal view (A) at 4 days of life and (B) at 8 weeks. At 8 weeks, the left ventricle (LV) is dilated with interventricular septum bowing to the right. Ao: ascending aorta; LA: left atria.