Purpose We documented improved cardiac performance using a new implantable direct
cardiac compression (DCC) device in an ovine chronic heart failure (HF) model. The
implantable device has 2 concentric chambers encompassing left and right ventricles. Inner
saline-filled chambers couple the device and epicardium. The outer chambers cyclically fill
with air and empty, compressing the ventricles during systole and aiding cardiac relaxation
and filling during diastole. Methods HF was created in 6 sheep using microsphere …