Catheter-based heart support system and method of implanting thereof
A device for circulatory support of the heart with holding means implanted intracardially in the left or right ventricular outflow of the heart by catheter, using an endovascular method, through a femoral access or a percutaneous transventricular, transseptal, transapical or transvenous access, the holding means comprises anchoring means fixed in the subcommissural triangle underneath the aortic valve and the pulmonary valve, in the flow direction of the blood on the ventricular side of the aortic valve and the pulmonary valve, a pump fixed in the holding means by a catheter, using an endovascular method, through a femoral access or a percutaneous transventricular, transseptal, transapical or transvenous access, the pump can be inserted releasably into the holding means after the holding means has been fixed by the anchoring means in the subcommissural triangles underneath the aortic valve and the pulmonary valve, or is connected to the collapsible and expandable anchoring means.
1. A circulatory support device, comprising:
a pump-holder configured to attach to subcommissural triangles underneath an aortic valve or a pulmonary valve of an in-vivo heart, the pump holder not extending through the aortic valve or the pulmonary valve; and
a pump configured to be placed in the pump-holder, the pump not extending through the aortic valve or the pulmonary valve.
2. The circulatory support device according to claim 1 , wherein the pump-holder includes an expandable stent.
3. The circulatory support device according to claim 2 , wherein the pump includes an electric motor including a stator assembly that couples to the stent, and a rotor assembly that is disposed in the stator assembly.
4. The circulatory support device according to claim 3 , wherein at least one of the stator assembly and the rotor assembly of the pump includes permanent magnets.
5. The circulatory support device according to claim 1 , wherein the pump includes a rotational shaft to which a collapsible blade is attached, and during operation of the pump the collapsible blade pumps blood in a direction of the aortic valve or the pulmonary valve, respectively.
6. The circulatory support device according to claim 1 , wherein the pump is one of a rotary blood pump, an axial flow pump with a central impeller, and a centrifugal flow pump, the pump-holder includes a stent graft including a holding arm, and the pump is attached to the stent graft via the holding arm.
7. The circulatory support device according to claim 3 , wherein the electric motor includes an electrical supply line that is connectable to a power supply and configured to be disposable in the heart via a percutaneously placed guide wire, and the electrical supply line provides a seal of an opening in the heart for the percutaneously placed guide wire.
8. The circulatory support device according to claim 7 , wherein the electrical supply line is configured to be guided from a left or right ventricle of the heart through an apex of the left or right ventricle of the heart to a site at a skin surface of a patient.
9. The circulatory support device according to claim 7 , wherein the electrical supply line is configured to be guided from a left or right ventricle of the heart through a lateral wall of the left and/or right ventricle or through a lower wall of the left or right ventricle and to a site at a skin surface of a patient.
10. The circulatory support device according to claim 7 , wherein the electrical supply line is configured to extend in a cardiac septum and to be guided to a site at a skin surface of a patient.
11. The circulatory device according to claim 7 , wherein the electrical supply line is configured to be guided from a left ventricle of the heart through a cardiac septum into a right ventricle and then further through a free wall of the right ventricle and to a site at a skin surface of a patient.
12. The circulatory device according to claim 7 , wherein the electrical supply line is configured to be guided from a left ventricle of the heart through a cardiac septum into a right ventricle, and through a tricuspid valve into a right atrium, then through a vena cava to a large peripheral vein and through a through-opening into subcutaneous tissue and to a site at a skin surface of a patient.
13. The circulatory device according to claim 7 , wherein the electrical supply line is configured to be guided from a left ventricle of the heart through a mitral valve into a left atrium, then through an interatrial septum into a right atrium, then through a vena cava to a large peripheral vein and through a through-opening into subcutaneous tissue and to a site at a skin surface of a patient.
14. The circulatory device according to claim 5 , wherein the collapsible blade collapses to minimize impedance to flow when the pump is not active.
15. The circulatory device according to claim 1 , wherein the pump includes an electric motor having a stator with a plurality of coils that alternate winding direction.