Ablation catheter assembly with radially decreasing helix and method of use
First Claim
1. A catheter assembly for electrically isolating a pulmonary vein for treatment of cardiac arrhythmia, the catheter assembly comprising:
- a catheter body including. a proximal portion, an intermediate portion extending from the proximal portion and defining a longitudinal axis, a distal portion extending from the intermediate portion and including;
an ablation section forming a loop transverse to the longitudinal axis and defining a diameter greater than an outer dimension of a pulmonary vein ostium, a tip extending distally from the ablation section, the tip configured for locating a pulmonary vein; and
an ablative energy source associated with the ablation section;
wherein upon activation of the energy source, the ablation section ablates a desired lesion pattern.
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Accused Products
Abstract
A catheter assembly for treatment of cardiac arrhythmia. The catheter assembly includes a catheter body and an ablative energy source. The catheter body includes a proximal portion, an intermediate portion, and a distal portion. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and includes an ablation section and a tip. The ablation section forms a loop defining a diameter greater than an outer dimension of a pulmonary vein ostium. The tip extends distally from the ablation section and is configured to locate a pulmonary vein. Finally, the ablative energy source is associated with the ablation section. With this configuration, upon activation of the energy source, the ablation section ablates a desired lesion pattern. In one preferred embodiment, the ablation section forms a distally decreasing radius helix, whereas the tip includes a relatively linear leader section. With this one preferred configuration, the tip readily locates a pulmonary vein and guides the ablation section to a seated relationship about a pulmonary vein ostium (or extra-ostial).
163 Citations
56 Claims
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1. A catheter assembly for electrically isolating a pulmonary vein for treatment of cardiac arrhythmia, the catheter assembly comprising:
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a catheter body including. a proximal portion, an intermediate portion extending from the proximal portion and defining a longitudinal axis, a distal portion extending from the intermediate portion and including;
an ablation section forming a loop transverse to the longitudinal axis and defining a diameter greater than an outer dimension of a pulmonary vein ostium, a tip extending distally from the ablation section, the tip configured for locating a pulmonary vein; and
an ablative energy source associated with the ablation section;
wherein upon activation of the energy source, the ablation section ablates a desired lesion pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56)
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19. A catheter assembly for electrically isolating a vessel from a chamber wall for treatment of cardiac arrhythmia, the catheter assembly comprising:
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a catheter body including;
a proximal portion, an intermediate portion extending from the proximal portion and defining a longitudinal axis, a distal portion extending from the intermediate portion and including;
an ablation section forming a loop, a tip extending distally from the ablation section, the tip configured for locating a vessel, wherein the tip is characterized as having a feature different from the ablation section, the feature being selected from the group consisting of shape, material, durometer and porosity; and
an ablative energy source associated with the ablation section;
wherein upon activation of the energy source, the ablation section ablates a desired lesion pattern.
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34. A catheter assembly for electrically isolating a vessel from a chamber wall for treatment of cardiac arrhythmia, the catheter assembly comprising:
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a catheter body including;
a proximal portion, an intermediate portion extending from the proximal portion and defining a longitudinal axis, a distal portion extending from the intermediate portion and comprising;
an ablation section forming a loop transverse to the longitudinal axis, a tip extending distally from the ablation section, the tip defining a shape different from a shape defined by the ablation section;
an ablative energy source associated with the ablation section;
wherein upon activation of the energy source, the ablation section ablates a desired lesion pattern.
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49. A method of electrically isolating a vessel from a chamber, the vessel forming an ostium at a wall of the chamber, for treatment of cardiac arrhythmia, the method comprising:
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selecting a catheter assembly including a catheter body and an ablative energy source, the catheter body including a proximal portion and a distal portion, the distal portion including an ablation section and a tip, the ablation section forming a loop and the tip extending distally from the ablation section, wherein the ablative energy source is associated with the ablation section;
guiding the distal portion into the chamber;
locating the vessel vein with the tip;
advancing the distal portion such that the ablation section contacts the chamber wall about the ostium and at least a portion of the tip seats within the vessel; and
activating the ablative energy source to ablate a lesion pattern about at least a portion of the ostium to electrically isolate the vessel from the chamber.
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Specification