Methods for accessing a left ventricle
Two minimally invasive therapeutic procedures, particularly for patients with congestive heart failure, may be performed separately or together. One procedure involves providing a valved passageway through the patient's left ventricular wall at the apex of the patient's heart and advancing instruments through the valved passageway to connect the valve leaflets of the patient's heart valve, e.g. the mitral valve. The second procedure involves advancing a pacing lead and a pacing lead implanting device through a trocar in the patient's chest and implanting the pacing lead on an exposed epicardial region of the patient's heart wall. The pacing lead has a penetrating electrode which is secured within the heart wall. Improved devices for these procedures include a minimally invasive grasping device for heart leaflets, a leaflet connector with artificial cordae tendenae and a pacing lead implant instrument.
1. A method for accessing a left ventricle of a heart, said method comprising:
placing a valve structure having a tissue-penetrating securing element through a passageway in an apical wall of the heart;
penetrating the securing element into tissue surrounding the valve structure in the apical wall to secure the valve structure in the passageway; and
introducing a tool through the valve structure into the left ventricle;
wherein the valve structure has an exit flush with an inner surface of the left ventricle and an entrance flush with an outer surface of the heart.
2. The method as in claim 1 , wherein the securing element is attached to an outer surface of the valve structure.
3. The method as in claim 2 , wherein the securing element is disposed circumferentially about a cylindrical wall of the valve structure.
4. The method as in claim 3 , wherein the securing element comprises a plurality of hooks or barbs.
5. The method as in claim 1 , wherein the valve structure comprises a one-way valve.
6. The method as in claim 5 , wherein the one-way valve comprises a duck bill valve.
7. The method as in claim 1 , wherein introducing the tool comprises engaging a heart valve.
8. The method as in claim 7 , wherein engaging the heart valve comprises repairing an incompetent heart valve.
9. The method as in claim 8 , wherein the incompetent heart valve comprises a mitral valve.
10. The method as in claim 1 , wherein introducing the tool comprises a procedure selected from the group consisting of transmyocardial revascularization, aortic stenting for aortic dissections and aneurysm therapy, removal of clots and vegetations from prosthetic valves, excision of heart tumors, implantation of stem cell and vascular growth factors, and closure of ventricular septal defects.