Mechanism, system, method for in vivo lead fixation
First Claim
1. A fixation mechanism for a pacing lead positioned at a distal end of the pacing lead, the pacing lead having one or more stimulation electrodes that stimulate cardiac tissue when the pacing lead is advanced into an epicardial coronary vein of a left ventricle and is configured to be surrounded by a parietal pericardium with an attached phrenic nerve on one side and a myocardium on an opposite side, the fixation mechanism comprising:
- a fixation component that has an expandable portion, the expandable portion faces the parietal pericardium and is positioned on a side opposite an active surface of the one or more stimulation electrodes that faces the myocardium, wherein when the expandable portion of the fixation component expands, the expandable portion of the fixation component is configured to;
move the parietal pericardium and the attached phrenic nerve away from the one or more stimulation electrodes,fix the active surface of the one or more stimulation electrodes onto a tissue region of the myocardium within the epicardial coronary vein; and
form an insulating barrier between the parietal pericardium and the active surface of the one or more stimulation electrodes that are fixed onto the tissue region of the myocardium within the epicardial coronary vein to insulate the attached phrenic nerve from the active surface of the one or more stimulation electrodes, the insulation barrier having an impedance that is based on a position of the fixation component within the epicardial coronary vein.
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Accused Products
Abstract
A lead for in vivo procedures for stimulation of a tissue is provided that has stimulating electrodes and a fixation mechanism disposed at a distal end of the lead. The fixation mechanism includes a fixation component disposed on an opposite side with respect to an active surface of the stimulation electrodes. The lead fixation mechanism when deployed disposes the active surface of stimulation electrodes onto a tissue region opposite to the fixation component. A system and a method for optimally positioning the lead for stimulation of the tissue are also provided.
12 Citations
17 Claims
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1. A fixation mechanism for a pacing lead positioned at a distal end of the pacing lead, the pacing lead having one or more stimulation electrodes that stimulate cardiac tissue when the pacing lead is advanced into an epicardial coronary vein of a left ventricle and is configured to be surrounded by a parietal pericardium with an attached phrenic nerve on one side and a myocardium on an opposite side, the fixation mechanism comprising:
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a fixation component that has an expandable portion, the expandable portion faces the parietal pericardium and is positioned on a side opposite an active surface of the one or more stimulation electrodes that faces the myocardium, wherein when the expandable portion of the fixation component expands, the expandable portion of the fixation component is configured to; move the parietal pericardium and the attached phrenic nerve away from the one or more stimulation electrodes, fix the active surface of the one or more stimulation electrodes onto a tissue region of the myocardium within the epicardial coronary vein; and form an insulating barrier between the parietal pericardium and the active surface of the one or more stimulation electrodes that are fixed onto the tissue region of the myocardium within the epicardial coronary vein to insulate the attached phrenic nerve from the active surface of the one or more stimulation electrodes, the insulation barrier having an impedance that is based on a position of the fixation component within the epicardial coronary vein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification