Bipolar mapping of intracardiac potentials using recessed electrodes
First Claim
1. A method for measuring near-field electrical activity at a location in a heart comprising:
- introducing into the heart a catheter comprising;
an elongated tubular body having a distal region and a circumferential recess along the length of the distal region, a first electrode mounted on the distal region in close proximity to the circumferential recess, and a second electrode mounted within the circumferential recess;
positioning the distal region at the location in the heart so that the first electrode is in direct contact with heart tissue and the second electrode is not in direct contact with heart tissue but is in contact with blood;
obtaining a first signal with the first electrode;
obtaining a second signal with the second electrode;
comparing the first signal and the second signal to obtain the near-field electrical activity at the location in the heart.
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Accused Products
Abstract
A method for measuring near-field electrical activity at a location in a heart comprising introducing into the heart a catheter. The catheter comprises an elongated tubular body having a distal region and a circumferential recess along the length of the distal region, a first electrode mounted on the distal region in close proximity to the circumferential recess, and a second electrode mounted within the circumferential recess. The distal region is positioned at the location in the heart so that the first electrode is in direct contact with heart tissue and the second electrode is not in direct contact with heart tissue but is in contact with blood. A first signal is obtained with the first electrode, and a second signal is obtained with the second electrode. The first signal and the second signal are compared to obtain the near-field electrical activity at the location in the heart.
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Citations
34 Claims
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1. A method for measuring near-field electrical activity at a location in a heart comprising:
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introducing into the heart a catheter comprising;
an elongated tubular body having a distal region and a circumferential recess along the length of the distal region, a first electrode mounted on the distal region in close proximity to the circumferential recess, and a second electrode mounted within the circumferential recess;
positioning the distal region at the location in the heart so that the first electrode is in direct contact with heart tissue and the second electrode is not in direct contact with heart tissue but is in contact with blood;
obtaining a first signal with the first electrode;
obtaining a second signal with the second electrode;
comparing the first signal and the second signal to obtain the near-field electrical activity at the location in the heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for measuring near-field electrical activity at a location in a heart comprising:
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introducing into the heart a catheter comprising;
an elongated body having an outer diameter and a distal region, a first electrode mounted on the distal region, and a second electrode mounted on the distal region in close proximity to and electrically isolated from the first electrode, the second electrode having an outer diameter less than the outer diameter of the portion of the distal region on which it is mounted;
positioning the distal region at the location in the heart so that the first electrode is in direct contact with heart tissue and the second electrode is not in direct contact with heart tissue but is in contact with blood;
obtaining a first signal with the first electrode;
obtaining a second signal with the second electrode;
comparing the first signal and the second signal to obtain the near-field electrical activity at the location in the heart. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for measuring near-field electrical activity at a location in a heart comprising:
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introducing into the heart a catheter comprising;
an elongated body having a distal region, a first electrode mounted on the distal region, and a second electrode mounted on the distal region in close proximity to and electrically isolated from the first electrode, the second electrode being covered by a blood-permeable membrane that prohibits direct contact between the second electrode and surrounding heart tissue;
positioning the distal region at the location in the heart so that the first electrode is in direct contact with heart tissue and the second electrode is not in direct contact with heart tissue but is in contact with blood;
obtaining a first signal with the first electrode;
obtaining a second signal with the second electrode;
comparing the first signal and the second signal to obtain the near-field electrical activity at the location in the heart. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34)
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29. A catheter comprising:
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an elongated body having a distal region;
a first electrode mounted on the distal region; and
a second electrode mounted on the distal region in close proximity to and electrically isolated from the first electrode, the second electrode being covered by a blood-permeable membrane that, in use, prohibits direct contact between the second electrode and surrounding heart tissue.
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Specification