Method and system for reducing arterial restenosis in the presence of an intravascular stent
AssigneeCardiac Pacemakers, Inc.
InventorsBruce H. KenKnight, Jay A. Warren, Stephen John Hahn
Life of this patent
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Abstract
A first electrode is positioned within an artery proximate an implanted intravascular stent. A second electrode is positioned at a separate location relative the position of the first electrode. Electrical energy is then delivered between the first and the second electrodes to produce an electrical field adjacent the implanted intravascular stent. When a intravascular stent is implanted in a coronary artery, the delivery of the electrical energy is coordinated to cardiac cycles detected in sensed cardiac signals, where the delivery of the electrical energy between the first electrode and the second electrode occurs during a predetermined portion of the cardiac cycle.
Claims18
A method, comprising:
- sensing cardiac signals, where the cardiac signals include a cardiac cycle;
- positioning a first electrode within an artery proximate an implanted intravascular stent;
- positioning a second electrode at a remote position outside the lumen of the stent;
- and
- delivering at least one pulse of electrical energy between the first electrode and the second electrode during a predetermined portion of the cardiac cycle, at a repetition rate that is on the order of a frequency between heart depolarizations.
A method, comprising:
- positioning at least a portion of a first electrode within a lumen of an intravascularly implanted stent;
- positioning a second electrode at a remote position outside the lumen of the stent;
- and
- delivering at least one pulse of electrical energy between the first electrode and the second electrode, at a repetition rate that is on the order of a frequency between heart depolarizations.
A method comprising:
- sensing cardiac signals, where the cardiac signals include a cardiac cycle;
- positioning a first electrode on a catheter within an artery proximate an implanted intravascular stent, including positioning at least a portion of the catheter within the artery to position the first electrode proximate the implanted intravascular stent;
- positioning a second electrode at a remote position outside a lumen of the stent;
- delivering electrical energy between the first electrode and the second electrode during a predetermined portion of the cardiac cycle;
- and
- wherein a third electrode is positioned on the catheter proximal the first electrode, and wherein positioning the first electrode includes positioning the catheter within the artery so the first electrode is positioned proximal the implanted intravascular stent and the third electrode is positioned proximal the first electrode along the catheter.
A method comprising:
- sensing a cardiac signal that includes a cardiac cycle;
- positioning a first electrode within a vessel near an implanted intravascular stent;
- positioning a second electrode at a remote position relative to the first electrode;
- and
- delivering at least one pulse of electrical energy between the first and second electrodes during a predetermined portion of the cardiac cycle, at a repetition rate that is on the order of a frequency between heart depolarizations.
A method comprising:
- positioning at least a portion of a first electrode within a lumen of an intravascularly implanted stent;
- positioning a second electrode at a remote position relative to the first electrode;
- and
- delivering at least one pulse of electrical energy between the first electrode and the second electrode, at a repetition rate that is on the order of a frequency between heart depolarizations.
Dependencies are inferred from the claim text.