US20090157133A1 - Supraventricular tachy sensing vector - Google Patents

Supraventricular tachy sensing vector Download PDF

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Publication number
US20090157133A1
US20090157133A1 US12/277,101 US27710108A US2009157133A1 US 20090157133 A1 US20090157133 A1 US 20090157133A1 US 27710108 A US27710108 A US 27710108A US 2009157133 A1 US2009157133 A1 US 2009157133A1
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Prior art keywords
electrode
pulse generator
sensing vector
proximal
lead
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Abandoned
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US12/277,101
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David L. Perschbacher
James O. Gilkerson
Ron A. Balczewski
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Cardiac Pacemakers Inc
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Cardiac Pacemakers Inc
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Application filed by Cardiac Pacemakers Inc filed Critical Cardiac Pacemakers Inc
Priority to US12/277,101 priority Critical patent/US20090157133A1/en
Assigned to CARDIAC PACEMAKERS, INC. reassignment CARDIAC PACEMAKERS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GILKERSON, JAMES O., PERSCHBACHER, DAVID L., BALCZEWSKI, RON A.
Publication of US20090157133A1 publication Critical patent/US20090157133A1/en
Priority to US15/265,674 priority patent/US10350419B2/en
Priority to US16/440,367 priority patent/US11504538B2/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/37—Monitoring; Protecting
    • A61N1/3702—Physiological parameters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A61B5/339—Displays specially adapted therefor
    • A61B5/341—Vectorcardiography [VCG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A61B5/346—Analysis of electrocardiograms
    • A61B5/349—Detecting specific parameters of the electrocardiograph cycle
    • A61B5/363—Detecting tachycardia or bradycardia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/3621—Heart stimulators for treating or preventing abnormally high heart rate
    • A61N1/3622—Heart stimulators for treating or preventing abnormally high heart rate comprising two or more electrodes co-operating with different heart regions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
    • A61N1/36592—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by the heart rate variability
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
    • A61N1/39—Heart defibrillators
    • A61N1/3925—Monitoring; Protecting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
    • A61N1/39—Heart defibrillators
    • A61N1/3956—Implantable devices for applying electric shocks to the heart, e.g. for cardioversion
    • A61N1/3962—Implantable devices for applying electric shocks to the heart, e.g. for cardioversion in combination with another heart therapy
    • A61N1/39622—Pacing therapy

Definitions

  • This relates to the field of medical devices, and more specifically to a sensing vector for an implantable device.
  • Pulse generators and leads having electrodes implanted in or about the heart have been used to reverse certain life threatening arrhythmia, or to stimulate contraction of the heart. Electrical energy is applied to the heart via an electrode to return the heart to normal rhythm. Leads are usually positioned on, in, or near the ventricle or the atrium and the lead terminal pins are attached to a pacemaker or defibrillator which is implanted subcutaneously.
  • the pulse generator is configured to utilize the electrodes to receive signals from the heart which can indicate certain cardiac events.
  • a system includes a pulse generator including a can electrode and a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.
  • FIG. 1 shows a lead and pulse generator in accordance with one embodiment.
  • FIG. 2 shows a schematic representation of a lead and pulse generator in accordance with one embodiment.
  • FIG. 1 shows a view of a lead 100 coupled to a pulse generator 150 .
  • lead 100 is adapted to deliver defibrillation shock energy to a heart.
  • Certain embodiments deliver pacing pulses to a heart.
  • Pulse generator 150 can be implanted in a surgically-formed pocket in a patient's chest or other desired location.
  • Pulse generator 150 generally includes electronic components to perform signal analysis, processing, and control.
  • Pulse generator 150 can include a power supply such as a battery, a capacitor, and other components housed in a case or can 151 .
  • the device can include microprocessors to provide processing and evaluation to determine and deliver electrical shocks and pulses of different energy levels and timing for ventricular defibrillation, cardioversion, and pacing to a heart in response to cardiac arrhythmia including fibrillation, tachycardia, and bradycardia.
  • lead 100 includes a lead body 105 extending from a proximal end 107 to a distal end 109 and having an intermediate portion 111 .
  • Lead 100 includes one or more conductors, such as coiled conductors or other conductors, to conduct energy from pulse generator 150 to one or more electrodes, such as a distal defibrillation coil electrode 120 configured to be implanted in right ventricle 20 , and a proximal defibrillation coil electrode 122 configured to be implanted in right atrium 22 or superior vena cava 24 .
  • the superior vena cava and the right atrium are called the supraventricular portion of the heart.
  • the lead 100 can include a tip electrode 130 and a distal ring electrode 132 for ventricular sensing and pacing. Some embodiments include one or more proximal ring electrodes for atrial sensing and pacing.
  • Lead 100 can include lead terminal pins which are attached to pulse generator 150 at a header.
  • the system can include a unipolar system with the housing can 151 acting as an electrode or a bipolar system with a pulse between two electrodes 120 , 122 , or electrodes 130 , 132 .
  • the present system is directed to providing a supraventricular tachycardia sensing vector.
  • the present system provides a technique to better distinguish supraventricular tachycardia (SVT) from ventricular tachycardia (VT).
  • SVT supraventricular tachycardia
  • VT ventricular tachycardia
  • the proximal coil 122 was electrically coupled to can electrode 151 and tachycardia sensing was performed using the distal coil 120 to both the can 151 plus the proximal coil 122 .
  • this configuration results in difficulties in distinguishing between SVT and VT.
  • the present system electrically isolates the can electrode 151 from proximal coil electrode 122 and from the distal coil electrode 120 to provide a supraventricular tachy sensing vector.
  • coil electrode 122 can be electrically isolated from the can electrode 151 and a unipolar sensing vector can be from the proximal coil electrode 122 to the can electrode 151 .
  • a unipolar sensing vector can be from the distal coil 120 to the can electrode 151 .
  • a sensing vector can be from distal coil 120 to proximal electrode 122 .
  • the present system uncouples the proximal electrode 122 from the can 151 and provides sensing utilizing one or more of electrodes 130 , 132 .
  • sensing vector is described herein by the location of the two electrodes used by a sensing channel within the pulse generator.
  • the sensing channel uses the electrical signal that exists between the two electrodes to sense cardiac activity. Different sense vectors will present different aspects of the cardiac signal to the sensing channel. In the present embodiments, the sense vectors have improved performance for sensing SVT because these vectors produce a larger SVT to VT signal ratio than in the past.
  • both of the coil electrodes 120 , 122 are electrically uncoupled from the can electrode 151 such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode 151 .
  • the sensing vector can be provided between the distal electrode 120 and the can electrode 151 , or the sensing vector can be provided between the proximal electrode 122 and the can electrode 151 .
  • a second sensing vector can be provided between the distal coil electrode 120 and the proximal coil electrode 122 .
  • the pulse generator can be configured such that the unipolar sensing vector can alternate between the distal coil electrode 120 and the can electrode 151 and the proximal electrode 122 and the can electrode 151 .
  • the pulse generator is configured such that a first unipolar sensing vector between the distal coil electrode 120 and the can electrode 151 and a second unipolar sensing vector between the proximal electrode 122 and the can electrode 151 occur simultaneously.
  • the pulse generator can be configured to distinguish between VT and SVT using the unipolar sensing vectors discussed above.
  • one technique to distinguish between VT and SVT is to use a template of the correlation between shock vector electrograms and RV rate vector electrograms during normal sinus rhythm.
  • the template is compared to the on-going rhythm; if the rhythm matches the existing template, then it is believed that the origin of the rhythm is supraventricular and the device withholds therapy—the assumption being that a supraventricular rhythm follows the same conduction pathway as normal sinus rhythm, and thus the correlation of the two vectors during SVT would match the normal sinus rhythm template, and therapy can be delivered.
  • the rhythm is VT (i.e. the rhythm is not using the normal conduction pathway).
  • electrode 122 is disposed along the lead such that the electrode 122 is configured to be located in the right atrium 22 or superior vena cava 24 after implantation.
  • FIG. 2 shows a schematic representation of portions of the system described above, in accordance with one embodiment.
  • the lead includes a first conductor 202 coupled between the coil electrode 122 and electronics 201 within the pulse generator 150 .
  • the lead also includes a second conductor 203 coupled between distal coil electrode 120 and electronics 201 .
  • the can electrode 151 is also coupled to the electronics 201 .
  • Electronics 201 includes electrically pathways which provide that the electrodes 122 , and 120 are electrically insulated from the can electrode 151 .
  • the electronics 201 can be configured to allow the various connections to be uncoupled or coupled as desired.

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Physiology (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Electrotherapy Devices (AREA)

Abstract

A system includes a pulse generator including a can electrode and a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application claims the benefit under 35 U.S.C. 119(e) of U.S. Provisional Application No. 61/007,635, filed on Dec. 13, 2007, which is hereby incorporated by reference in its entirety.
    • TECHNICAL FIELD
  • This relates to the field of medical devices, and more specifically to a sensing vector for an implantable device.
    • BACKGROUND
  • Pulse generators and leads having electrodes implanted in or about the heart have been used to reverse certain life threatening arrhythmia, or to stimulate contraction of the heart. Electrical energy is applied to the heart via an electrode to return the heart to normal rhythm. Leads are usually positioned on, in, or near the ventricle or the atrium and the lead terminal pins are attached to a pacemaker or defibrillator which is implanted subcutaneously. The pulse generator is configured to utilize the electrodes to receive signals from the heart which can indicate certain cardiac events.
    • SUMMARY
  • A system includes a pulse generator including a can electrode and a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a lead and pulse generator in accordance with one embodiment.
  • FIG. 2 shows a schematic representation of a lead and pulse generator in accordance with one embodiment.
    •  DETAILED DESCRIPTION
  • In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the present invention. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.
  • FIG. 1 shows a view of a lead 100 coupled to a pulse generator 150. In one embodiment, lead 100 is adapted to deliver defibrillation shock energy to a heart. Certain embodiments deliver pacing pulses to a heart. Pulse generator 150 can be implanted in a surgically-formed pocket in a patient's chest or other desired location. Pulse generator 150 generally includes electronic components to perform signal analysis, processing, and control. Pulse generator 150 can include a power supply such as a battery, a capacitor, and other components housed in a case or can 151. The device can include microprocessors to provide processing and evaluation to determine and deliver electrical shocks and pulses of different energy levels and timing for ventricular defibrillation, cardioversion, and pacing to a heart in response to cardiac arrhythmia including fibrillation, tachycardia, and bradycardia.
  • In one embodiment, lead 100 includes a lead body 105 extending from a proximal end 107 to a distal end 109 and having an intermediate portion 111. Lead 100 includes one or more conductors, such as coiled conductors or other conductors, to conduct energy from pulse generator 150 to one or more electrodes, such as a distal defibrillation coil electrode 120 configured to be implanted in right ventricle 20, and a proximal defibrillation coil electrode 122 configured to be implanted in right atrium 22 or superior vena cava 24. The superior vena cava and the right atrium are called the supraventricular portion of the heart. In one embodiment, the lead 100 can include a tip electrode 130 and a distal ring electrode 132 for ventricular sensing and pacing. Some embodiments include one or more proximal ring electrodes for atrial sensing and pacing.
  • Lead 100 can include lead terminal pins which are attached to pulse generator 150 at a header. The system can include a unipolar system with the housing can 151 acting as an electrode or a bipolar system with a pulse between two electrodes 120, 122, or electrodes 130, 132.
  • The present system is directed to providing a supraventricular tachycardia sensing vector. The present system provides a technique to better distinguish supraventricular tachycardia (SVT) from ventricular tachycardia (VT). For example, in a past approach, the proximal coil 122 was electrically coupled to can electrode 151 and tachycardia sensing was performed using the distal coil 120 to both the can 151 plus the proximal coil 122. However, this configuration results in difficulties in distinguishing between SVT and VT.
  • In one embodiment, the present system electrically isolates the can electrode 151 from proximal coil electrode 122 and from the distal coil electrode 120 to provide a supraventricular tachy sensing vector. For example, coil electrode 122 can be electrically isolated from the can electrode 151 and a unipolar sensing vector can be from the proximal coil electrode 122 to the can electrode 151. In one embodiment, a unipolar sensing vector can be from the distal coil 120 to the can electrode 151. In one embodiment, a sensing vector can be from distal coil 120 to proximal electrode 122. These configurations are useful for distinguishing between SVT and VT.
  • In other embodiments, the present system uncouples the proximal electrode 122 from the can 151 and provides sensing utilizing one or more of electrodes 130, 132.
  • The term sensing vector is described herein by the location of the two electrodes used by a sensing channel within the pulse generator. The sensing channel uses the electrical signal that exists between the two electrodes to sense cardiac activity. Different sense vectors will present different aspects of the cardiac signal to the sensing channel. In the present embodiments, the sense vectors have improved performance for sensing SVT because these vectors produce a larger SVT to VT signal ratio than in the past.
  • Thus in various examples, both of the coil electrodes 120, 122 are electrically uncoupled from the can electrode 151 such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode 151. For example, the sensing vector can be provided between the distal electrode 120 and the can electrode 151, or the sensing vector can be provided between the proximal electrode 122 and the can electrode 151. In another example a second sensing vector can be provided between the distal coil electrode 120 and the proximal coil electrode 122.
  • In another example, the pulse generator can be configured such that the unipolar sensing vector can alternate between the distal coil electrode 120 and the can electrode 151 and the proximal electrode 122 and the can electrode 151. In one embodiment, the pulse generator is configured such that a first unipolar sensing vector between the distal coil electrode 120 and the can electrode 151 and a second unipolar sensing vector between the proximal electrode 122 and the can electrode 151 occur simultaneously.
  • The pulse generator can be configured to distinguish between VT and SVT using the unipolar sensing vectors discussed above. For example, one technique to distinguish between VT and SVT is to use a template of the correlation between shock vector electrograms and RV rate vector electrograms during normal sinus rhythm. When an arrhythmia is detected, the template is compared to the on-going rhythm; if the rhythm matches the existing template, then it is believed that the origin of the rhythm is supraventricular and the device withholds therapy—the assumption being that a supraventricular rhythm follows the same conduction pathway as normal sinus rhythm, and thus the correlation of the two vectors during SVT would match the normal sinus rhythm template, and therapy can be delivered.
  • However, if the correlation of the vectors during the rhythm does not match the template, then it is assumed that the rhythm is VT (i.e. the rhythm is not using the normal conduction pathway).
  • Further embodiments can use a different template created from the new vectors described herein. This new template would provide more power to discriminate problem cases using the template described above—and thus more information from the combination of more vectors would yield more discrimination power.
  • In one embodiment, electrode 122 is disposed along the lead such that the electrode 122 is configured to be located in the right atrium 22 or superior vena cava 24 after implantation.
  • FIG. 2 shows a schematic representation of portions of the system described above, in accordance with one embodiment. The lead includes a first conductor 202 coupled between the coil electrode 122 and electronics 201 within the pulse generator 150. The lead also includes a second conductor 203 coupled between distal coil electrode 120 and electronics 201. The can electrode 151 is also coupled to the electronics 201. Electronics 201 includes electrically pathways which provide that the electrodes 122, and 120 are electrically insulated from the can electrode 151. As discussed, the electronics 201 can be configured to allow the various connections to be uncoupled or coupled as desired.
  • It is understood that the above description is intended to be illustrative, and not restrictive. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the fall scope of equivalents to which such claims are entitled.

Claims (20)

1. A system comprising:
a pulse generator including a can electrode; and
a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.
2. The system of claim 1, wherein the sensing vector is provided between the distal electrode and the can electrode.
3. The system of claim 1, wherein the sensing vector is provided between the proximal electrode and the can electrode.
4. The system of claim 1, wherein a second sensing vector is provided between the distal coil electrode and the proximal coil electrode.
5. The system of claim 1, wherein the pulse generator is configured such that the unipolar sensing vector can alternate between the distal coil electrode and the can electrode and the proximal electrode and the can electrode.
6. The system of claim 1, wherein the pulse generator is configured such that a first unipolar sensing vector between the distal coil electrode and the can electrode and a second unipolar sensing vector between the proximal electrode and the can electrode occur simultaneously.
7. The system of claim 1, wherein the pulse generator is configured to distinguish between VT and SVT using the unipolar sensing vector.
8. A system comprising:
a pulse generator including a can electrode; and
a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, and further including a tip pacing/sensing electrode and a ring electrode, wherein the proximal coil electrode and the distal coil electrode are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between the distal electrode and the can electrode.
9. The system of claim 8, wherein a second unipolar sensing vector is provided between the proximal electrode and the can electrode.
10. The system of claim 8, wherein a third sensing vector is provided between the distal coil electrode and the proximal coil electrode.
11. The system of claim 8, wherein the lead is configured such that the proximal coil electrode is implantable in the right atrium and the distal coil electrode is implantable in the right ventricle.
12. The system of claim 8, wherein the pulse generator is configured to distinguish between VT and SVT using the unipolar sensing vector.
13. An apparatus comprising:
a pulse generator including a housing can electrode;
electronics located within the pulse generator; and
an electrical connection between the housing can electrode and the electronics;
wherein the electronics and electrical connection are configured such that when a lead is coupled to the pulse generator, a distal coil electrode on the lead is electrically uncoupled from the housing can electrode by the electrical pathway and a proximal coil electrode on the lead is electrically uncoupled from the housing can electrode, such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.
14. The apparatus of claim 13, wherein the pulse generator is configured such that the unipolar sensing vector is provided between the distal coil electrode and the can electrode.
15. The apparatus of claim 13, wherein the pulse generator is configured such that the unipolar sensing vector is provided between the proximal electrode and the can electrode.
16. The apparatus of claim 13, wherein a second sensing vector is provided between the distal coil electrode and the proximal coil electrode.
17. The apparatus of claim 13, wherein the pulse generator is configured to distinguish between VT and SVT using the unipolar sensing vector.
18. A method comprising:
providing a pulse generator including a can electrode; and
coupling a lead to the pulse generator, the lead including at least one proximal coil electrode which is electrically isolated from the can electrode, and the lead including a distal coil electrode which is electrically isolated from the can electrode;
implanting the lead such that the proximal coil electrode is located in the right atrium and the distal coil electrode is located in the right ventricle; and
sensing heart signals using a unipolar sensing vector between at least one of the coil electrode and the can electrode.
19. The method of claim 18, wherein sensing heart signals includes differentiating between SVT signals and VT signals.
20. The method of claim 18, wherein the lead includes one or more distal pacing and/or sensing electrodes.
US12/277,101 2007-12-13 2008-11-24 Supraventricular tachy sensing vector Abandoned US20090157133A1 (en)

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US15/265,674 US10350419B2 (en) 2007-12-13 2016-09-14 Supraventricular tachy sensing vector
US16/440,367 US11504538B2 (en) 2007-12-13 2019-06-13 Supraventricular tachy sensing vector

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Cited By (2)

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US20110218586A1 (en) * 2010-03-03 2011-09-08 Dan Li Methods and systems for recognizing arrhythmias using neural stimulation
US10350419B2 (en) 2007-12-13 2019-07-16 Cardiac Pacemakers, Inc. Supraventricular tachy sensing vector

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US11504538B2 (en) 2022-11-22
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EP2231004B1 (en) 2018-01-03

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