Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises a left chamber and a right chamber overlaying the left and right ventricles of the heart, respectively, where the chambers are expanded pneumatically to exert pressure on the heart and thereby mechanically assist its pumping. The timing of expansion of the left and right bladders is controlled by an electrical controller to match the desired or natural timing of contraction of the left and right ventricles, where both the left and right chambers may not expand simultaneously but are timed to optimize assistance of the heart. The embodiments provide jackets that apply pneumatic pressure to the right and left ventricles separately in timing to provide mechanical cardiac resynchronization therapy, as distinct from the conventional electrical stimulation cardiac resynchronization therapy.

Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises one or more pneumatic or hydraulic bladders. The pneumatic or hydraulic bladders are linked to a pump, and the pump fills the bladders with fluid and withdraws the fluid in a cycle to match beats of the heart to assist contraction and pumping of the heart in systole or to assist expansion and filling of the heart in diastole.

Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises one or more pneumatic or hydraulic bladders. The pneumatic or hydraulic bladders are linked to a pump, and the pump fills the bladders with fluid and withdraws the fluid in a cycle to match beats of the heart to assist contraction and pumping of the heart in systole or to assist expansion and filling of the heart in diastole.

Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises one or more pneumatic or hydraulic bladders. The pneumatic or hydraulic bladders are linked to a pump, and the pump fills the bladders with fluid and withdraws the fluid in a cycle to match beats of the heart to assist contraction and pumping of the heart in systole or to assist expansion and filling of the heart in diastole.

Abstract: New methods and devices for treating heart failure and other cardiac disease conditions. Devices include a cardiac jacket adapted to fit generally around at least a portion of the heart. The jacket in some embodiments includes an electroactive polymer to squeeze the exterior of the heart to assist contraction of one or more pumping chambers, preferably the left ventricle. The jacket may also include stem cells on an inner surface of the jacket. The stem cells differentiate into cardiac tissue and help treatment of heart failure. Some embodiments also involve delivering an electric field or an electric current to electrically conductive material in the jacket to establish an electromagnetic field at the surface of the heart effective to promote growth and differentiation of stem cells into cardiac tissue.

Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises one or more pneumatic or hydraulic bladders. The pneumatic or hydraulic bladders are linked to a pump, and the pump fills the bladders with fluid and withdraws the fluid in a cycle to match beats of the heart to assist contraction and pumping of the heart in systole or to assist expansion and filling of the heart in diastole.

Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises one or more pneumatic or hydraulic bladders. The pneumatic or hydraulic bladders are linked to a pump, and the pump fills the bladders with fluid and withdraws the fluid in a cycle to match beats of the heart to assist contraction and pumping of the heart in systole or to assist expansion and filling of the heart in diastole.

Abstract: One embodiment of the invention provides a cardiac assist device that is in direct blood contact with blood in the heart. It is linked to the heart by surgically coring a hole into the wall tissue of a pumping chamber of the heart, typically the left ventricle. The device includes a contractile element that is linked to the hole in the heart's pumping chamber. The contractile element comprises either an electroactive polymer or (ii) one or more pneumatic or hydraulic bladders. In the contracted state, the contractile element displaces fluid from the pumping chamber of the heart to assist with pumping of the heart and increase the ejection fraction of the pumping chamber.

Abstract: The embodiments relate to cardiac assist devices that comprise a jacket that wraps the exterior of the heart, where the jacket comprises one or more pneumatic or hydraulic bladders. The pneumatic or hydraulic bladders are linked to a pump, and the pump fills the bladders with fluid and withdraws the fluid in a cycle to match beats of the heart to assist contraction and pumping of the heart in systole or to assist expansion and filling of the heart in diastole.