Treatments for a patient with congestive heart failure
View Patent ↗The invention is directed to devices for two minimally invasive therapeutic procedures, particularly for patients with congestive heart failure. One procedure involves providing a valve to form a passageway through the patient's left ventricular wall at the apex of the patient's heart and configured to advance instruments through the valved passageway to connect the valve leaflets of the patient's heart valve, e.g. the mitral valve, in a “Bow-Tie” configuration to prevent or minimize regurgitation through the valve. The second procedure is directed to a pacing lead with a housing and a pacing lead implanting device which are configured to pass 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. One or both procedures may be performed on a patient with CHF. Other improved instruments include a leaflet connector with an artificial cordae tendenae strand secured to an end of the leaflet connector.
1. A minimally invasive method of treating a patient's heart, comprising:
a. accessing an exterior region of the patient's heart wall which defines in part the left ventricle;
b. providing a pacing lead which has an attached housing with opposed grasping surfaces and which has a tissue penetrating electrode extending distally from the housing in electrical conducting relationship with the pacing lead;
c. advancing the pacing lead through a small opening in the patient's chest cavity to the accessed region of the patient's heart wall;
d. providing a pair of rotatable tongs configured to grasp and rotate the pacing lead housing;
e. grasping the opposed grasping surfaces of the housing with the pair of rotatable tongs;
f. securing the pacing lead to the accessed region of the patient's heart wall by pressing the penetrating electrode of the pacing lead against the accessed exterior region of the patient's heart wall with the tongs and rotating the grasped pacing lead housing with the tongs while pressing the penetrating electrode against the accessed region to drive the penetrating electrode into the heart wall so as to remain therein when the tongs are released; and
g. delivering electrical pulses through the pacing lead to the penetrating electrode of the pacing lead within the heart wall to control the contraction of the heart wall to which the pacing lead is secured.
2. The method of claim 1 wherein a trocar is disposed in the small opening in the patient's chest to gain access to the patient's chest cavity.
3. The method of claim 1 wherein the electrical pulses have a frequency, duration, current and voltage sufficient to control the contraction of the patient's left ventricle to increase the output thereof.
4. The method of claim 1 wherein a second pacing lead is disposed in the right ventricle of the patient's heart and electrical pulses are emitted from an electrode on a distal portion of the second pacing lead having a frequency, duration, current and voltage sufficient to control the contraction of the right ventricle to increase the output thereof.
5. The method of claim 1 wherein an elongated delivery tube is provided which has a proximal end, a distal end configured to pass through the small opening in the patient's chest and an inner lumen extending to the distal end and configured to slidably receive the pacing lead when the pacing lead is advanced to the exposed region of the patient's heart wall.
6. The method of claim 5 wherein the delivery tube has a securing pod on the distal end thereof to releasably secure the distal end of the delivery tube to the exposed region of the patient's heart wall.
7. The method of claim 6 wherein the securing pod has a vacuum chamber and at least one vacuum conduit extending between the vacuum chamber and the leading surface of the securing pod and the securing pod is secured against the exposed region of the patient's heart wall by vacuum from within the chamber.
8. The method of claim 6 wherein the tongs are secured to a driving member associated with the delivery tube which is configured to close the tongs to engage the pacing lead housing and to rotate the housing in order to drive the penetrating electrode of the pacing lead into the exposed region of the patient's heart wall to secure the penetrating electrode within the heart wall.
9. The method of claim 8 wherein the driving member is an inflatable balloon which is disposed within the expanded distal end of the delivery tube.