means and methods of creating an autogeneous pumping chamber for ventricular replacement or ventricular assist while avoiding heart transplantation . a chamber is created by wrapping a major muscular mass around a silastic - type pouch which is thereafter filled with isotonic saline . the muscular mass is then allowed to grow together over time to create an autogeneous fluid - tight pumping chamber , the pouch is then drained and removed , and the autogeneous chamber is relocated to its needed location , and thereafter grafted into operative relationship within the cardiovascular system .