Lead stabilization devices and methods
Devices and methods for stabilizing an electrical lead in a cardiac vein of a heart using a tether and a stent anchor. The stent anchor may include a proximal eccentric apex such that the distal electrode of the lead lies against and establishes electrical contact with tissue of the heart.
1. A method for stabilizing an electrical lead in a cardiac vein of a heart, comprising:
providing an electrical lead having a lumen extending from a proximal entry port to a distal exit port, the lead including one or more distal electrodes connected via wires in the lead to a pulse generator;
providing an elongate device including an expandable and retrievable stent anchor and an elongate tether comprising a polymeric multifilament structure, the elongate tether connected to the anchor and extending proximally from the anchor;
delivering the elongate device into the cardiac vein and deploying the stent anchor;
inserting a proximal end of the tether into the distal exit port of the lead;
advancing the lead over the tether into the cardiac vein such that the elongate tether extends through the lumen and the proximal entry port of the lead with the stent anchor disposed distally of the lead, and wherein the lead is longitudinally movable over the tether in the heart, and
providing a connector and disposing the connector in the lumen of the lead adjacent the tether to limit longitudinal movement between the lead and the tether,
wherein the expandable and retrievable stent anchor is expandable from a first delivery configuration to a second deployed configuration, wherein the second configuration is larger than the first configuration, and wherein the stent anchor includes a proximal taper and a proximal eccentric apex configured to facilitate retrieval into a tube, wherein the tether is connected to the apex and wherein the step of deploying the stent anchor comprises deploying the stent anchor such that the one or more distal electrodes of the lead lie against and establish electrical contact with tissue of the heart.
2. A method for stabilizing an electrical lead in a cardiac vein of a heart, comprising:
providing an electrical lead having a lumen extending from a proximal entry port to a distal exit port, the lead including one or more distal electrodes connected via wires in the lead to a pulse generator;
providing an elongate device including an expandable anchor and an elongate tether comprising a polymeric multifilament structure, the elongate tether connected to the anchor and extending proximally from the anchor;
delivering the elongate device into the cardiac vein and deploying the anchor;
inserting a proximal end of the tether into the distal exit port of the lead;
advancing the lead over the tether into the cardiac vein such that the elongate tether extends through the lumen and the proximal entry port of the lead with the anchor disposed distally of the lead, wherein the lead is longitudinally movable over the tether in the heart; and
securing the lead to the elongate device to limit longitudinal movement therebetween;
wherein the expandable and retrievable anchor is expandable from a first delivery configuration to a second deployed configuration, wherein the second configuration is larger than the first configuration, and wherein the anchor includes a proximal taper and a proximal eccentric apex configured to facilitate retrieval into a tube, wherein the tether is connected to the apex and wherein the step of deploying the anchor comprises deploying the anchor such that the one or more distal electrodes of the lead lie against and establish electrical contact with tissue of the heart.