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Figure 1: Echocardiogram of the twin I with parasternal long-axis view showing a large well-circumscribed hyperechoic homogeneous mass in the interventricular septum and smaller similar masses attached to the ventricular wall. Inflow and outflow portions are free

Figure 1: Echocardiogram of the twin I with parasternal long-axis view showing a large well-circumscribed hyperechoic homogeneous mass in the interventricular septum and smaller similar masses attached to the ventricular wall. Inflow and outflow portions are free