Despite modern surgical techniques, complications and early mortality remain high following postinfarction ventricular septal defect (VSD) repair. It is now possible to close these acquired defects percutaneously using, for example, the Amplatzer postinfarct muscular VSD device. Cardiovascular magnetic resonance is an important tool in determining appropriate case selection and device sizing as it can provide a multicomponent assessment of the VSD anatomy, ventricular volumes and function, infarct extent, and left-to-right shunt calculations.
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