Atrial ablation catheter adapted for treatment of septal wall arrhythmogenic foci and method of use
First Claim
Patent Images
1. An ablation catheter configured to ablate septal wall tissue, comprising:
- an elongate delivery tube defining a major axis and having a distal end adapted for insertion into the heart of a patient;
at least one resilient arm with a delivery configuration and an expanded configuration, wherein the at least one resilient arm comprises a distal arm section, a proximal arm section, and a bend section disposed between the distal arm section and the proximal arm section, the proximal arm section of the at least one resilient arm defining a shape selected from the group consisting of cordate, hastate, and sagittate when the at least one resilient arm is in the expanded configuration; and
a plurality of electrodes disposed on the proximal arm section of the at least one resilient arm, wherein the distal arm section defines a substantially linear configuration substantially orthogonal to the major axis when the at least one resilient arm is in the expanded configuration.
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Abstract
An atrial ablation catheter with an electrode array particularly adapted to locate and ablate foci of arrhythmia which are required for sustained atrial fibrillation is provided. The array is easily deployed and retracted from the catheter, and presents a proximally oriented electrode array that can be pulled against the septal wall of the left atrium to engage the septal wall.
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Citations
34 Claims
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1. An ablation catheter configured to ablate septal wall tissue, comprising:
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an elongate delivery tube defining a major axis and having a distal end adapted for insertion into the heart of a patient; at least one resilient arm with a delivery configuration and an expanded configuration, wherein the at least one resilient arm comprises a distal arm section, a proximal arm section, and a bend section disposed between the distal arm section and the proximal arm section, the proximal arm section of the at least one resilient arm defining a shape selected from the group consisting of cordate, hastate, and sagittate when the at least one resilient arm is in the expanded configuration; and a plurality of electrodes disposed on the proximal arm section of the at least one resilient arm, wherein the distal arm section defines a substantially linear configuration substantially orthogonal to the major axis when the at least one resilient arm is in the expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An ablation catheter configured to ablate septal wall tissue, comprising:
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an elongate delivery tube having a distal end adapted for insertion into the heart of a patient; at least one resilient arm with a delivery configuration and an expanded configuration, wherein the at least one resilient arm comprises a distal arm section, a proximal arm section, and a bend section disposed between the distal arm section and the proximal arm section, the proximal arm section of the at least one resilient arm defining a shape selected from the group consisting of cordate, hastate, and sagittate when the at least one resilient arm is in the expanded configuration; and a plurality of electrodes disposed on the proximal arm section of the at least one resilient arm, wherein the bend section is pre-formed in the at least one resilient arm and forms an acute angle with the distal arm section. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An ablation catheter configured to ablate septal wall tissue, comprising:
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an outer catheter tube defining a major axis and having a distal end adapted for insertion into the heart of a patient; an inner catheter tube slidably disposed within the outer catheter tube; a pin slidably disposed within the inner catheter tube; at least one resilient arm with a delivery configuration and an expanded configuration, wherein the at least one resilient arm comprises a distal arm section attached to the pin, a proximal arm section attached to the inner catheter tube, and a bend section disposed between the distal arm section and the proximal arm section, wherein the distal arm section defines a substantially linear configuration substantially orthogonal to the major axis when the at least one resilient arm is in the expanded configuration, and proximal arm section of the at least one resilient arm defines a shape selected from the group consisting of cordate, hastate, and sagittate when the at least one resilient arm is in the expanded configuration; and a plurality of electrodes disposed on the proximal arm section of the at least one resilient arm. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A method of treating atrial fibrillation comprising:
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inserting an ablation catheter defining a major axis into the left atrium of the heart of a patient; expanding a resilient arm of the ablation catheter by bending the resilient arm at a bend section in the resilient arm, wherein the resilient arm comprises proximal and distal arm sections extending from the bend section, the distal arm section defining a substantially linear configuration substantially orthogonal to the major axis when the resilient arm is substantially expanded, and the proximal arm section of the at least one resilient arm defining shape selected from the group consisting of cordate, hastate, and sagittate when the resilient arm is substantially expanded; pulling the proximal arm section of the resilient arm into contact with septal wall tissue; and passing energy through at least one electrode disposed on the proximal arm section to ablate the septal wall tissue. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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Specification