Figure 6a. Membranous ventricular septal defect in an 11-month-old boy with a heart murmur. (a) Axial ECG-gated spin-echo image shows a defect (arrow) in the membranous part of the septum. (b) Axial gradient-echo cine image shows a flow jet (*) across the defect into the right ventricle, indicating a left-to-right shunt.