The ventricle of a heart can be reshaped by passing a plurality of catheters from inside the ventricle to outside the ventricle through holes in the ventricle wall. Fluid-tight bags are then delivered through the catheters and expanded outside the ventricle to a diameter that is larger than the holes. A fluid substance is introduced into the bags, and the fluid substance is configured to solidify into solid pads that are also larger than the holes. The solid pads are then pulled towards each other and locked in position in order to reshape the ventricle.
