JPH07184919A - Abrasion balloon catheter - Google Patents

Abstract

PURPOSE:To treat tachyarrhythmia. CONSTITUTION:This catheter tube 1 is for treatment of the tachyarrhythmia and is provided with a balloon 6 at or near its front end. The outside surface of this balloon 6 is provided with an electrode 8 for measuring the intracardiac potential. The outer perrphery of the catheter tube 1 in the balloon is provided with an electrode 7 for energization of a high-frequency AC. Lead wires are connected to the electrodes 7, 8 of the catheter tube 1. A liquid feed path for supplying or sucking liquid for inflating the balloon 6 is formed in the catheter tube 1. As a result, detection of a cauterization section and cauterization are executed by the one catheter and the rapid execution of the cauterization is made possible by setting the cauterization range in an arbitrary position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ablation balloon catheter used for treating tachyarrhythmia in cardiovascular diseases.

[0002]

BACKGROUND ART Arrhythmias in cardiovascular diseases are generally 30
% Is due to bradyarrhythmia, but 70% is tachyarrhythmia (WPW)
Syndrome, ventricular tachycardia, etc.).

As a treatment for tachyarrhythmia, a drug treatment with an antiarrhythmic drug, which is a conservative and non-radical therapy, is adopted, but for drug-resistant patients, open treatment accompanied by surgical invasion is performed. Chest surgery has been performed, and in recent years, minimally invasive catheter ablation capable of percutaneous treatment for drug-resistant patients has been performed.

The purpose of this catheter ablation is to cure the tachyarrhythmia by physically impairing the excitatory circuit such as the origin of tachycardia, which is the cause of tachyarrhythmia, or the accessory conduction pathway.

As a catheter ablation generally used in the past, an tachycardia origin, a secondary conduction path, etc. were used by using an electrode catheter composed of a catheter tube having a diameter of about 2 mm to 3 mm with a plurality of electrodes attached to the tip. The tachyarrhythmia is treated by detecting the tachycardia occurrence site and creating a localized myocardial disorder at the detected tachycardia occurrence site and the like by direct current energization and high frequency alternating current energization energy.

In catheter ablation using this DC energizing energy, a DC defibrillator is usually used as a DC energizing device, and DC energizing is performed by using a catheter tip electrode as a cathode and a counter electrode plate placed on the back of the body to be treated as an anode. To do.
Energization is carried out at 100 to 200 Joules, and discharge is completed within a few msec. At this time, discharge occurs from the tip of the electrode, and a spark with a center temperature of 3,000 to 10,000 ° C is formed. This therapy has a problem that the myocardium is damaged by heat and a shock wave caused by the generation of anesthesia, and this therapy requires general anesthesia when energizing.

Conventional catheter ablation using high-frequency alternating current energizing energy generally uses high-frequency energy of about 500 KHz and 13.56 MHZ as an energy source. When high-frequency alternating current is applied to living tissue, there are exothermic effect, electrolysis effect (change in tissue due to electrolysis), and Faraday effect (electrical excitement of biological membrane), but at high frequencies of 350 KHZ and above, electrolysis effect And the Faraday effect is hardly seen. That is, when electrolysis is applied to living tissue, polarization occurs, but the direction of electrolysis changes at high speed when high-frequency alternating current is applied.
The electrons and molecules in the living body cannot fully respond to this change, and when agitated, a kind of frictional heat is generated and a heat generating effect is obtained.

The mechanism of the disorder in this therapy is that the electrolysis generated around the electrodes causes the tissue itself to generate heat, which reduces the water content of the myocardium with heat generation and causes protein degeneration to cause coagulative necrosis.

Then, the energization for generating the high frequency alternating current energizing energy is performed at 20 to 50 W, the temperature of the tissue in contact with the electrode rises to 60 to 80 ° C., and coagulation necrosis occurs in 20 to 30 seconds. Unlike the DC energization, the one using the high-frequency AC energization energy gradually generates heat and correlates the myocardial coagulation region with the energy, so that the coagulation region is easily controlled and excellent in adjustability. Moreover, since general anesthesia is not required, it is possible to perform ablation 10 to 10 times at a time.

On the other hand, on the other hand, for example, JP-A-61-2644
As described in Japanese Patent No. 4 publication, a catheter having a balloon having a plurality of electrodes attached to its tip is used to detect a tachycardia occurrence site such as tachycardia origin or accessory conduction path. Are known.

A catheter for percutaneous angioplasty using high-frequency AC energizing energy is also known, for example, as described in Japanese Patent Application Laid-Open No. 3-251258.

[0012]

In the above-mentioned conventional ablation using an electrode catheter, the ablation site is determined by using a cartel for site detection, and the ablation site is cauterized with high frequency AC power source energy. However, the electrode catheter for percutaneous use has an outer diameter of about 1 mm because the electrode for high-frequency alternating current is formed at the tip of the catheter tube. This electrode catheter has a small cauterization range. Since the depth is shallow, there are few complications such as perforation, but in the case where the lesion is deep, there was a problem that it took too long to finally complete and complete the treatment.

Further, since the outer diameter of the catheter tube of the high-frequency alternating current-carrying electrode is small, it is often impossible to surely cauterize the ventricular tachycardia when the lesion is deep.

An ablation catheter using direct current energizing energy as the ablation energy has a sufficient ablation size, but lacks uniformity of ablation, and sudden death after surgery has become a problem in the United States.

Further, in the catheter described in the above-mentioned Japanese Patent Laid-Open No. 61-62444, even if the cauterization site can be determined by detecting the potential of the tachycardia generation site, this catheter cannot perform cauterization treatment. , A tachycardia generation site must be cauterized by another ablation catheter with high-frequency AC power source energy.
The catheter described in Japanese Patent No. 258 can cauterize, but has a problem that the tachycardia occurrence site cannot be detected.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an ablation balloon catheter which is effective and can treat tachyarrhythmia in a short time.

[0017]

An ablation balloon catheter of the present invention is for treating tachyarrhythmia, and is provided on the outer surface of the balloon, which is provided at or near the distal end of the catheter tube. An electrode for measuring an intracardiac potential, an electrode for high-frequency alternating current provided on the outer circumference of the catheter tube in the balloon, a lead wire disposed on the catheter tube and connected to the electrode, The catheter tube is provided with a liquid supply path for supplying or sucking a liquid for inflating the balloon.

The ablation balloon catheter according to the second aspect of the present invention is the ablation balloon catheter according to the first aspect, wherein the balloon wraps the distal end of the catheter tube in a bag shape.

An ablation balloon catheter according to a third aspect of the present invention is the ablation balloon catheter according to the first aspect, wherein the electrode for high-frequency alternating current is provided with two poles on the outer circumference of the catheter tube inside the balloon.

An ablation balloon catheter according to a fourth aspect of the present invention is the ablation balloon catheter according to the first aspect, wherein a temperature sensor is provided on the outer surface of the balloon.

An ablation balloon catheter according to a fifth aspect of the present invention is the ablation balloon catheter according to the first aspect, wherein a temperature sensor is provided inside the balloon.

[0022]

The ablation balloon catheter used for the treatment of tachyarrhythmia according to the first aspect of the present invention measures the intracardiac potential provided on the outer surface of the balloon by injecting the liquid into the balloon from the liquid feeding path and inflating the balloon. Intracardiac potential is measured from the electrodes for detection, the origin of tachycardia and the accessory conduction pathway that cause tachyarrhythmia are detected, and the balloon is fixed in that state as it is while measuring the intracardiac potential. By applying high-frequency current to the electrodes for high-frequency alternating current provided on the outer circumference of the catheter tube in the balloon to generate heat, protein denaturation of the tissue in contact with the balloon is caused by heat, and the size of the balloon can be set to any value. Wide in size,
Tachyarrhythmia can be treated by deep coagulative necrosis.

The ablation balloon catheter according to the second aspect of the present invention is capable of spot cauterization particularly on the distal end side of the balloon, and is suitable for cases such as ventricular tachycardia, AV node and recurrent tachycardia in the atrium. Suitable.

In the ablation balloon catheter of the present invention as defined in claim 3, high frequency alternating current is applied between the two electrodes by the two electrodes for high frequency alternating current application, and the electrode is ablated without arranging the electrode outside the body of the patient to be treated. it can.

In the ablation balloon catheter of the present invention as defined in claim 4, the temperature of the portion in contact with the tachycardia site can be directly measured by the temperature sensor provided on the outer surface of the balloon, and the temperature of the balloon is, for example, 60 ° C to 80 ° C. The temperature can be controlled reliably within the range of ℃, and the tachyarrhythmia treatment site can be cauterized without fail to reliably perform tachyarrhythmia treatment. Moreover, since the temperature of the balloon can be controlled and cauterization can be performed for a relatively long time, tachyarrhythmia can be reliably treated by cauterizing even a case with a deep lesion.

In the ablation balloon catheter according to the fifth aspect of the present invention, the temperature sensor provided in the balloon allows a predetermined temperature, for example, the temperature between the inside of the balloon and the outer surface of the balloon to be a temperature due to the liquid fed into the balloon. Even if a difference occurs, the tachycardia occurrence site in contact with the balloon can be cauterized safely, and tachyarrhythmia can be safely treated.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction of one embodiment of the ablation balloon catheter of the present invention will be described with reference to FIGS.

FIG. 1 is a side view of the distal end of the ablation balloon catheter for explaining the longitudinal section, FIG. 2 is a front view for explaining the same, FIG. 3 is a sectional view taken along line aa of FIG. 1, and FIG. 4 is a line bb of FIG. 1 to 4, reference numeral 1 denotes a catheter tube, for example, an outer side made of a thermoplastic resin such as polyethylene resin and having a circular cross section with an outer diameter of about 2 mm to 4 mm and a hollow shape. It is composed of a tube 2 and an inner tube 3 which is made of a thermoplastic resin such as polyethylene resin and has a circular cross section and is inserted into the outer tube 2. The tip of the inner tube 3 projects from the tip of the outer tube 2.

A bending mechanism 5 that allows the distal end side of the catheter tube 1 to be bent in an arbitrary direction from the proximal end side is inserted into the hollow portion 4 of the inner tube 3 of the catheter tube 1. A large number of wire rods are bundled in a flexible cover, the tip side is fixed to this cover, and the wire rod is selectively advanced and retracted by operation from the base end side, so that the tip side bends and the direction is oriented in any direction. Is able to.

Reference numeral 6 denotes a balloon, which is formed in a tubular shape from a thermoplastic resin such as polyethylene resin. One end of the balloon 6 is liquid-tightly connected to the tip of the outer tube 2 of the catheter tube 1. It is closed, and the other end is liquid-tightly connected to the tip of the inner tube 3 to be closed.

Further, a high-frequency current-carrying electrode 7 made of a metal material having a high conductivity with respect to high frequencies, such as platinum, is formed on the outer circumference of the inner tube 3 inside the balloon 6.

Further, a plurality of dot-shaped electrodes 8 for measuring the intracardiac potential are formed on one side of the outer surface of the balloon 6.

A temperature sensor 10 is provided on one side surface of the outer surface of the balloon 6, detects the temperature of the balloon 6, and controls the temperature of the balloon 6 within the range of 60 ° C to 80 ° C.

The high-frequency current-carrying electrode 7 is connected to a lead wire 11 provided inside the inner tube 3,
The lead wire is connected to the power supply device by the lead wire, and the electrode 8 for measuring the intracardiac potential is connected to the power supply device by a lead wire (not shown) provided inside the outer tube 2 from the outer surface of the balloon 6. It is connected to the. Furthermore, the temperature sensor
Reference numeral 10 is connected to the control device of the power supply device by a lead wire (not shown) arranged in the outer tube 2.

A liquid supply path 12 for supplying or sucking a liquid for inflating the balloon 6 is formed between the outer tube 2 and the inner tube 3 of the catheter tube 1, and the tip of the liquid supply path 12 is formed. Is communicated with the inside of the balloon 6 from the tip of the outer tube 2, and the proximal end side of the liquid supply path 12 is connected to a pump.

Next, the operation of this embodiment will be described.

The catheter tube 1 is percutaneously inserted from the blood vessel to the vicinity of the tachycardia occurrence site, and the balloon 6 is provided with the liquid feeding path 12
Liquid is injected from the balloon 6 to inflate the balloon 6, and the bending mechanism 5
While bending the distal end side of the catheter tube 1 from the proximal end side in an arbitrary direction by operation, the intracardiac potential is received from the intracardiac potential measuring electrode 8 provided on the outer surface of the balloon 6, and the tachycardia Detects tachycardia origins such as tachycardia origin and accessory pathways that are the cause of sexual arrhythmia.

At the tachycardia generation site, the balloon 6 is fixed as it is, and the electrode 8 for measuring the intracardiac potential is obtained.
While measuring the intracardiac potential with the potential received from the balloon 6
The electrode 7 for high-frequency alternating current energization provided on the outer periphery of the inner catheter tube 1 is used as a cathode, for example, a counter electrode plate disposed outside the body of the patient to be treated as an anode electrode, and high-frequency electricity is conducted between the electrode 7 and the body of the patient to be treated. Then, the liquid in the balloon 6 is heated to generate heat in the balloon 6, thereby causing protein denaturation in the tissue in contact with the balloon 6, and widening to any size depending on the size of the balloon, and deep coagulation necrosis. By doing so, tachyarrhythmia treatment can be performed.

While cauterizing the electrodes 7 and the body to be treated by high-frequency electric current, a signal from the electrode 8 for measuring the intracardiac potential, for example, a potential signal at the tachycardia occurrence site is recorded and measured. At the same time, the temperature of the balloon 6 can be controlled by controlling high-frequency energization with a signal from the temperature sensor 10.

An electrode 7 for energizing high frequency alternating current is provided on the outer circumference of the catheter tube 1 in the balloon 6.
It is also possible to use, as a cathode, a counter electrode plate disposed outside the body of the patient to be treated as an anode.

In particular, the ablation balloon catheter of this embodiment is used for cauterization along the atrioventricular valve annulus or for recurrent tachycardia cautery in the atrioventricular node or in the atrium for the ablation of the accessory pathway of WPW syndrome. It is suitable.

The temperature of the balloon 6 is detected by the temperature sensor 10 provided on the outer surface, and the temperature of the balloon 6 is adjusted by adjusting the high frequency applied to the electrode 7 for high frequency alternating current application. Control at 60 ° C to 80 ° C. Since the temperature sensor 10 is provided on the outer surface of the balloon 6, the temperature of the tissue with which the balloon 6 is in contact can be measured. Therefore, cauterization can be safely performed for a long time, and cauterization can be reliably performed even when the lesion is deep.

In this embodiment, the balloon 6 is inflated to have an outer diameter of 5 mm to 10 mm and an axial length of about 10 mm to 30 mm. The point electrode 8 for measuring the intracardiac potential preferably has a diameter of about 2 mm.

Next, another embodiment of the ablation balloon catheter of the present invention will be described with reference to FIG.

In FIG. 5, reference numeral 21 denotes a catheter tube having a circular cross section, and a distal end side of the catheter tube 21 is operated from a proximal end side in a hollow portion 22 having a circular cross section formed at an eccentric position of this cross section. The bending mechanism 5 capable of bending in any direction is inserted.

In addition, the catheter tube 21 has a hollow portion formed in a semi-circular arc shape so as to surround the hollow portion 22, and a liquid supply path 23 is formed. The liquid supply path 23 is the tip of the catheter tube 21. It is communicated with a balloon that is liquid-tightly provided in the.

In this structure, the catheter tube 21 can be composed of a single tube member without using the outer tube and the inner tube.

Another structure of this embodiment is the same as that shown in FIG.
The description is omitted because it is the same as the configuration shown in FIG. The operation of the embodiment is also the same.

Further, the construction of another embodiment of the ablation balloon catheter of the present invention will be described with reference to FIGS. 6 and 7.

In this embodiment, the opening edge of the bag-shaped balloon 32 is liquid-tightly sealed to the tip of the catheter tube 31 with the catheter tube 31 wrapped around.

A plurality of electrodes 8 for measuring the intracardiac potential are formed on the tip of the outer surface of the balloon 32, and a temperature sensor 10 is provided. Also this balloon
A high-frequency current-carrying electrode 7 is formed on the peripheral surface of the catheter tube 31 disposed inside 32.

Since the other structure is the same as that of the embodiment shown in FIGS. 1 to 4, the description thereof will be omitted.

In the configuration of this embodiment, the tip surface of the balloon 32 is brought into contact with the tachycardia occurrence site to detect the tachycardia occurrence site by measuring the potential from the electrode 8 for measuring the intracardiac potential. And
At the tachycardia occurrence site, the balloon 32 is fixed as it is, and while measuring the intracardiac potential with the potential received from the electrode 8 for measuring the intracardiac potential, the high-frequency alternating current electrode 7 is energized at high frequency, and the balloon 32 By causing the fever to heat, the tachycardia occurrence site in contact with the distal end surface of the balloon 32 is cauterized to perform tachyarrhythmia treatment.

In addition, this embodiment is particularly suitable for an ablation balloon catheter used for the treatment of cases such as ventricular tachycardia suitable for spot cauterization, recurrent tachycardia in atrial nodules and chambers.

Also in this embodiment, the outer diameter is 5 mm to 10 mm with the balloon 32 inflated.

Next, another embodiment of the ablation balloon catheter of the present invention will be described with reference to FIGS.

In this embodiment, the balloon 41 having a substantially fan-shaped cross section which bulges toward the one side surface of the distal end portion of the catheter tube 1.
On the outer surface of the balloon 41, a plurality of electrodes 8 for measuring intracardiac potential and a temperature sensor 10 are provided.

Then, the electrode 7 for high-frequency alternating current is placed on the outer circumference of the catheter tube 1 while being positioned inside the balloon 41.
To form.

In the configuration of this embodiment, the side surface of the balloon 41 is brought into contact with the tachycardia occurrence site, and the potential from the intracardiac potential measurement electrode 8 is measured to detect the tachycardia occurrence site. Then, at the tachycardia occurrence site, the balloon 41 is fixed as it is, and while the intracardiac potential is measured by the potential received from the intracardiac potential measurement electrode 8, the radio frequency alternating current energization electrode 7 is energized with high frequency, By causing the balloon 41 to generate heat, the tachycardia occurrence site in contact with the distal end surface of the balloon 41 is cauterized to perform tachyarrhythmia treatment. And, in this embodiment, in particular,
It is suitable for ablation balloon catheters used for ablation therapy in a relatively wide area such as atrial flutter.

The ablation balloon catheter of this embodiment is useful for eccentrically cauterizing, particularly for cauterization from the inside of a coronary vein, because the epicardial side is not cauterized and only the myocardial side is cauterized. Is. In this case, balloon 41
Axial length is 5mm-10mm Radial length is 2mm-4mm
It will be about.

Next, another embodiment of the ablation balloon catheter of the present invention will be described with reference to FIGS.

The construction of this embodiment is the same as that of the embodiment shown in FIG. 1 to FIG. 4 or FIG. 5, but the balloon 51 has a substantially gourd shape with the axially intermediate portion squeezed in the inflated state,
An electrode 8 for measuring an intracardiac potential is formed on the outer surface of the intermediate portion and the widened portion of the balloon 51. And this balloon
An electrode 7 for energizing high frequency alternating current is formed on the outer circumference of the catheter tube 1 while being positioned inside 51.

In this embodiment, the other structure is the same as that of the above embodiment.

In the ablation balloon catheter of this embodiment, the balloon 51 is used for cauterization of the tachycardia site.
Is attached to the tachycardia occurrence site, for example, so as to sandwich the atrioventricular valve annulus more efficiently, and tachyarrhythmia can be treated in a short time even if the tachycardia occurrence site is cauterized and the lesion is deep, In particular, the stability of the fixation of the catheter is enhanced, and cauterization can be reliably performed.

Further, another embodiment of the ablation balloon catheter of the present invention will be described with reference to FIG.

In this embodiment, in the configuration of the embodiment shown in FIG. 1 to FIG. 4 or FIG. 5, inside the balloon 6, electrodes 7a, 7b for supplying two poles of high frequency alternating current are provided on the outer circumference of the catheter tube 1. They are formed apart from each other in the axial direction, and the other structure is the same as that of the embodiment shown in FIG. 1 to FIG. 4 or FIG.

In the structure of this embodiment, high frequency electricity is applied between the electrodes 7a, 7b of the two poles by the electrodes 7a, 7b of the two poles for energizing the high frequency alternating current, without arranging the electrodes outside the body to be treated. Can be cauterized.

Another embodiment of the ablation balloon catheter of the present invention will be described with reference to FIG.

In this embodiment, in the ablation balloon catheter shown in FIGS. 1 to 4, the balloon 61 is used.
A ring-shaped electrode 62 for measuring the intracardiac potential in the circumferential direction is provided at a plurality of positions, for example, two positions at an axial interval on the outer surface of the. Other configurations are the same as those shown in FIGS. 1 to 4.

With the configuration of this embodiment, the site where the tachycardia is generated can be easily detected, and cauterization can be performed on the epicardial side and the myocardial side.

In each of the above embodiments, the temperature sensor 10 is provided on the outer surface of the balloon, but the temperature sensor may be provided inside the balloon. In this case, heat is generated in the high-frequency AC current-carrying electrode inside the balloon, so that the safety in the case of a liquid in which the temperature changes inside and outside the balloon is enhanced.

Further, temperature sensors are provided respectively on the outer surface of the balloon and the inside of the balloon to improve the accuracy of temperature control of the balloon and enhance the safety of the balloon.

[0073]

According to the first aspect of the present invention, the ablation range can be set to an arbitrary range depending on the size of the balloon, and the ablation can be deeper and deeper than the conventional ablation using the electrode catheter, and the ablation can be performed outside the balloon. Tachyarrhythmia treatment can be performed by detecting the end of ablation by the electrode for measuring the intracardiac potential on the surface.

According to the second aspect of the present invention, in particular, spot cauterization can be performed on the distal end surface side of the balloon, and the accessory conduction path of WPW syndrome, the ablation of the atrioventricular annulus, or the atrioventricular node or the atrium Suitable for cases such as recurrent tachycardia.

According to the third aspect of the present invention, the bipolar electrodes for high-frequency alternating current can be cauterized without arranging the electrodes outside the body of the patient to be treated.

According to the fourth aspect of the present invention, the temperature sensor provided in the balloon can control the temperature range of the entire balloon, and a safe tachyarrhythmia treatment can be performed.

According to the fifth aspect of the invention, the tachyarrhythmia treatment can be reliably performed by the temperature sensor provided on the outer surface of the balloon.

[Brief description of drawings]

FIG. 1 is an explanatory side view of an ablation balloon catheter showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a cross-sectional view taken along line 1a-a of FIG.

FIG. 4 is a cross-sectional view taken along line 1b-b of FIG.

FIG. 5 is a cross-sectional view of an ablation balloon catheter showing another embodiment of the present invention.

FIG. 6 is an explanatory side view of an ablation balloon catheter showing another embodiment of the present invention.

FIG. 7 is a front view of the same.

FIG. 8 is an explanatory side view of an ablation balloon catheter showing another embodiment of the present invention.

FIG. 9 is a front view of the same.

FIG. 10 is an explanatory side view of an ablation balloon catheter showing another embodiment of the present invention.

FIG. 11 is a front view of the same.

FIG. 12 is an explanatory longitudinal sectional side view of an ablation balloon catheter showing another embodiment of the present invention.

FIG. 13 is an explanatory longitudinal sectional side view of an ablation balloon catheter showing another embodiment of the present invention.

[Explanation of symbols]

 1,21,31 Catheter tube 6,32,41,51,61 Balloon 7,7a, 7b Electrodes for high-frequency alternating current 8,62 Electrodes for intracardiac potential measurement 10 Temperature sensor 12,23 Liquid transfer path

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[Procedure amendment]

[Submission date] January 19, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

Ablation according to the invention Problems to be Solved The conventional electrode catheter, tachycardia generation site using lessee ether for part detection determines the ablation site, cauterize tachycardia occurrence site in the high frequency AC power supply energy However, because the electrode for high-frequency alternating current is formed at the tip of the catheter tube, the electrode catheter that can be used percutaneously has an outer diameter of the catheter tube of about 2 mm to 3 mm, and this electrode catheter has a cauterization range. However, there are few complications such as perforation due to its small size and shallow depth of reach, but in the case of deep lesions, there was a problem that it took too long to finally complete and complete the treatment.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0074

[Correction method] Change

[Correction content]

According to the second aspect of the present invention, in particular, spot ablation can be performed on the distal end surface side of the balloon, and the accessory conduction path of WPW syndrome, the ablation of the atrioventricular valve annulus , or the atrioventricular nodule or the atrium Suitable for cases such as recurrent tachycardia.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

Claims (5)

[Claims] 1. A balloon provided at or near the tip of the catheter tube, an electrode for measuring an intracardiac potential provided on the outer surface of the balloon, and an electrode provided on the outer circumference of the catheter tube in the balloon. An electrode for energizing high-frequency alternating current, a lead wire arranged in the catheter tube and connected to the electrode, and a liquid supply path for supplying or sucking a liquid for inflating the balloon into the catheter tube An ablation balloon catheter for the treatment of tachyarrhythmia. 2. The ablation balloon catheter according to claim 1, wherein the balloon wraps the distal end of the catheter tube in a bag shape. 3. The ablation balloon catheter according to claim 1, wherein two electrodes are provided on the outer circumference of the catheter tube in the balloon for supplying high-frequency alternating current. 4. The ablation balloon catheter according to claim 1, wherein a temperature sensor is provided on the outer surface of the balloon. 5. The ablation balloon catheter according to claim 1, wherein a temperature sensor is provided in the balloon.