[Digital subtraction ventriculography in imaging the interventricular septum of the heart]

A method for imaging the interventricular septum of the heart by digital subtraction ventriculography in the left oblique projection is proposed: 20 ml of contrast agent is injected in the right atrium, and the right ventricle is imaged, then the left ventricle is seen on the left phase. In order to discern the interventricular septum, the right ventricle image is taken as a "mask", then the left ventricle is fixed, and the interventricular septum is seen between two contrast cavities on the final image. The dual subtraction method by choosing the later "mask"-frame at the maximally contrast right ventricle for imaging the septum was used for the first time.