Medical apparatus, namely, a device consisting of attachment screws, which are implanted in the left ventricle (LV) wall and used as an anchor for the elastic elements and elastic elements comprising metal springs which are anchored between neighboring attachment screws and harness energy produced by the LV during systole and release it during diastole without the need of an external power source or any pumping machinery, all for improving ventricular diastolic function; medical kits consisti...