SENSING WITH COMPENSATION FOR NEURAL STIMULATOR

• US 20080021507A1
• Filed: 01/09/2007
• Published: 01/24/2008
• Est. Priority Date: 12/24/2003
• Status: Abandoned Application

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Zhu, Qingsheng, Libbus, Imad, Girouard, Steven
• Application Number:
  US11/621,194
• Publication Number:
  US 20080021507A1
• Time in Patent Office: Days
• US Class Current: 607/17
• CPC Class Codes: A61N 1/36117 for treating hypertension
• CPC Class Codes: A61N 1/3614 based on impedance measurement
• CPC Class Codes: A61N 1/36564 controlled by blood pressure

Abstract

An aspect relates to an implantable medical system. An embodiment of the system comprises a baroreflex stimulator, a cardiac event detector, and communication circuitry. The stimulator includes a pulse generator to apply baroreflex stimulation therapy. The detector includes a sensor to detect electrical signals indicative of cardiac events, and a controller connected to the sensor to determine an occurrence of a cardiac event from the electrical signals using an event detection routine. The communication circuitry communicates between the baroreflex stimulator and the cardiac event detector to account for applied baroreflex stimulation therapy and enable the cardiac event detector to discriminate the electrical signals indicative of the cardiac event from the applied baroreflex stimulation therapy.

Claims

6-1. The system of claim 6, wherein:

the implantable cardiac stimulator device is adapted to provide a communication signal corresponding to a refractory period; and

the implantable NS device is adapted to receive the communication signal corresponding to the refractory period and to apply neural stimulation during the refractory period.

7-2. The system of claim 6, wherein the implantable cardiac stimulator device includes a pacemaker.

9. An implantable medical system, comprising:

a neural stimulator adapted to apply neural stimulation therapy;

a cardiac event detector, including a sensor to detect electrical signals indicative of cardiac events, and a controller connected to the sensor to determine an occurrence of a cardiac event from the electrical signals using an event detection routine; and

communication circuitry to communicate between the neural stimulator and the cardiac event detector to enable the cardiac event detector to increase a threshold for the event detection routine to account for the applied neural stimulation therapy.

10. The system of claim 9, wherein the cardiac event detector is adapted to identify a refractory period and trigger the neural stimulator to apply neural stimulation therapy during the refractory period.

11. The system of claim 9, wherein the neural stimulator is adapted to deliver neural stimulation to an afferent nerve using a cuff electrode.

12. The system of claim 9, wherein the neural stimulator is adapted to deliver neural stimulation to an afferent nerve using an intravascularly-fed electrode.

13. The system of claim 9, wherein the neural stimulator is adapted to deliver neural stimulation to a cardiac fat pad.

14. The system of claim 9, wherein the cardiac event detector is further adapted to provide a blanking window to prevent identification of the cardiac event while the neural stimulation therapy is being applied.

15. An implantable medical system, comprising:

a neural stimulator adapted to apply neural stimulation therapy;

a cardiac event detector, including a sensor to detect electrical signals indicative of cardiac events, and a controller connected to the sensor to determine an occurrence of a cardiac event from the electrical signals using an event detection routine; and

communication circuitry to communicate between the neural reflex stimulator and the cardiac event detector to enable the cardiac event detector to provide a blanking window to prevent identification of the cardiac event while the neural stimulation therapy is being applied.

16. The system of claim 15, wherein the cardiac event detector is adapted to identify a refractory period and trigger the neural stimulator to apply neural stimulation therapy during the refractory period.

17. The system of claim 15, wherein the neural stimulator is adapted to deliver neural stimulation to an afferent nerve using a cuff electrode.

18. The system of claim 15, wherein the neural stimulator is adapted to deliver neural stimulation to an afferent nerve using an intravascularly-fed electrode.

19. The system of claim 15, wherein the neural stimulator is adapted to deliver neural stimulation to a cardiac fat pad.

20. The system of claim 15, wherein the cardiac event detector is further adapted to increase a threshold for the event detection routine to account for the applied neural stimulation therapy.