Intravenous cardiac lead with wave shaped fixation segment
First Claim
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1. A pacing lead for a cardiac stimulator comprising:
- an elongated, flexible insulating lead body having a proximal end, a distal end and a lumen extending therebetween with an electrode attached to the lead body at the distal end and a terminal pin attached to the proximal end, the lead body including an elongated conductor disposed in the lumen for connecting the electrode to the terminal pin, the lead body dimensioned to be passed through the coronary sinus vein and into a branch of the great coronary vein, the lead body having a zone with a preformed shape configuration immediately proximal to the electrode, the preformed shape being a wave exhibiting a series of peaks and valleys for engaging a wall of the great coronary vein branch at a predetermined number of discrete, longitudinally spaced points for holding the electrode relatively fixed in position irrespective of forces due to body movements and blood flow in the coronary vein and coronary sinus vein and for decoupling said forces from the lead tip.
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Abstract
An intravenous lead for use with a cardiac device for implantation in the coronary venous system of the heart includes a lead body that is adapted to be routed through the vascular system into the coronary sinus with the distal end portion of the lead placed in the great cardiac vein or branch vein. The lead body includes a preformed section disposed just proximal of its tip so that the lead body exhibits a two-dimensional wave having peaks and valleys for contacting the endothelial layer of the vein at discrete, longitudinally spaced points to stabilize the electrode against displacement.
159 Citations
23 Claims
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1. A pacing lead for a cardiac stimulator comprising:
an elongated, flexible insulating lead body having a proximal end, a distal end and a lumen extending therebetween with an electrode attached to the lead body at the distal end and a terminal pin attached to the proximal end, the lead body including an elongated conductor disposed in the lumen for connecting the electrode to the terminal pin, the lead body dimensioned to be passed through the coronary sinus vein and into a branch of the great coronary vein, the lead body having a zone with a preformed shape configuration immediately proximal to the electrode, the preformed shape being a wave exhibiting a series of peaks and valleys for engaging a wall of the great coronary vein branch at a predetermined number of discrete, longitudinally spaced points for holding the electrode relatively fixed in position irrespective of forces due to body movements and blood flow in the coronary vein and coronary sinus vein and for decoupling said forces from the lead tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
Specification