Abstract: A method for use in reconstructing the left ventricle of the heart of a patient from a diseased state to an appropriate reconstructed state is disclosed. The method includes the steps of determining the body surface area of the patient; determining a characteristic of the left ventricle which is the same in the diseased state as in the reconstructed state; determining an appropriate sizer based on the determined body surface area of the patient and the characteristic of the left ventricle which is the same in the diseased state as in the reconstructed state; identifying akinetic tissue within a heart chamber wall; making an incision through the akinetic tissue in the chamber wall; inserting said appropriate sizer into the chamber through the incision; removing the sizer; and, closing the incision.