System and method of detecting and diagnosing pacing system malfunctions

• US 7,970,472 B2
• Filed: 06/23/2008
• Issued: 06/28/2011
• Est. Priority Date: 06/23/2008
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Ricke, Anthony, Rowlandson, Gordon Ian
• Primary Examiner(s): MANUEL, GEORGE C
• Application Number:
  US12/144,075
• Publication Number:
  US 20090318997A1
• Time in Patent Office: 1,100 Days
• Field of Search: 607/27
• US Class Current: 607/27
• CPC Class Codes: A61N 1/3706 Pacemaker parameters stimulation threshold A61N1/371

Abstract

A method of diagnosing a malfunction of a pacing system includes the steps of receiving a biopotential signal, detecting a pacing system malfunction, detecting a cause of the malfunction, and displaying the detected malfunction and detected cause of the malfunction. A pacing system is also disclosed herein. The system includes an electrode array that receives a biopotential signal associated with the pacing system. A malfunction detector applies a malfunction logic to the biopotential signal to identify a pacing system malfunction and applies a morphology logic to the biopotential signal to identify a morphology of the biopotential signal. An output generator receives an indication of the identified pacing system malfunction and the identified cause of the malfunction and creates an output indicative of the identified pacing system malfunction and the identified cause.

Claims

1. A method of diagnosing a malfunction of a pacing system, comprising the steps of:

receiving a combined signal that is a high bandwidth combined signal that comprises a biopotential signal and a pacer signal;

applying a first logic to the high bandwidth combined signal, the first logic being directed to detecting a pacing system malfunction when applied to the high bandwidth combined signal;

detecting a pacing system malfunction;

determining a cause of the detected malfunction; and

displaying the detected malfunction and the determined cause of the malfunction.

2. The method of claim 1, further comprising the steps of:

selecting a second logic based on the detected pacing system malfunction; and

applying the second logic to the high bandwidth combined signal.

3. The method of claim 2, wherein the second logic is a morphology-based logic, that determines a cause of the detected malfunction based on the morphology of the high bandwidth combined signal.

4. The method of claim 1 wherein the detected pacing system malfunction is an inappropriate rate, and the determined cause of the malfunction is a pacemaker defect.

5. A method of diagnosing a malfunction of a pacing system, the method comprising the steps of:

receiving a combined signal;

detecting a pacing system malfunction;

selecting a morphology logic to apply to the combined signal to determine the cause of the detected malfunction; and

identifying a morphological feature of the combined signal based on the application of the morphology logic to the combined signal;

determining a cause of the detected malfunction; and

displaying the malfunction and the determined cause of the malfunction;

wherein the step of detecting a pacing system malfunction detects a failure to sense malfunction, the morphology logic is selected based upon the detected failure to sense malfunction, and the determined cause of the malfunction is lead fracture.

6. The method of claim 5, wherein the received combined signal is a high bandwidth signal and further comprises a biopotential signal and a pacer signal.

7. A method of diagnosing a malfunction of a pacing system, the method comprising the steps of:

receiving a combined signal;

detecting a failure to capture pacing system malfunction;

detecting a failure to sense pacing system malfunction;

based upon the detected failure to capture and the detected failure to sense malfunctions, determining a macro dislodgement cause of the failure to capture and failure to sense pacing system malfunctions; and

displaying the detected malfunction and the determined cause of the malfunction.

8. The method of claim 7, wherein the received combined signal is a high bandwidth signal and further comprises a biopotential signal and a pacer signal.

9. A method of diagnosing a malfunction of a pacing system, the method comprising the steps of:

receiving a combined signal;

detecting a pacing system malfunction;

determining a cause of the detected malfunction; and

displaying the detected malfunction and the determined cause of the malfunction;

wherein the detected pacing system malfunction is a failure to capture, and the determined cause of the malfunction is micro dislodgement.

10. The method of claim 9 wherein the detected failure to capture pacing system malfunction is detected in the absence of the detection of a failure to sense and an inappropriate rate pacing system malfunctions.

11. The method of claim 9, wherein the received combined signal is a high bandwidth signal and further comprises a biopotential signal and a pacer signal.

12. A method of diagnosing a malfunction of a pacing system, the method comprising the steps of:

receiving a combined signal;

detecting an inappropriate rate pacing system malfunction;

detecting a failure to capture pacing system malfunction;

selecting a logic to apply to the biopotential signal based on the detected inappropriate rate and failure to capture pacing system malfunctions;

applying the selected logic to the biopotential signal;

identifying an excessive pace droop biopotential signal morphology;

determining a cause of the detected malfunction; and

displaying the detected malfunction and the determined cause of the malfunction;

wherein the determined cause of the malfunction is depletion of a pacing system battery.

13. The method of claim 12, wherein the received combined signal is a high bandwidth signal and further comprises a biopotential signal and a power signal.

14. A system for detecting pacing system malfunctions, the system comprising:

an electrode array configured to be attached to a patient being treated with an electrical pacing system, the electrode array receiving a combined signal comprising a signal associated with the electrical pacing system and a biopotential signal;

a malfunction detector, the malfunction detector comprising a malfunction logic and a morphology logic, the malfunction detector receiving the combined signal, applying the malfunction logic to the combined signal to identify a pacing system malfunction, and applying the morphology logic to the combined signal to identify a morphology of the combined signal, the morphology being indicative of the cause of the malfunction; and

an output generator connected to the malfunction detector, the output generator receiving an indication of the identified pacing system malfunction and the identified cause of the malfunction, the output generator creating an output that displays the identified pacing system malfunction and the identified cause.

15. The system of claim 14 further comprising an ECG monitor that collects the combined signal from the electrode array.

16. The system of claim 15 wherein the combined signal collected by the ECG monitor is a high bandwidth combined signal.

17. The system of claim 16 further comprising a cause logic that receives the identified pacing system malfunction from the malfunction logic and receives the identified morphology of the combined signal, the cause logic determining the cause of the malfunction based upon the identified malfunction and the identified morphology.

18. The system of claim 17 further comprising a medical history database, the medical history database comprising historical patient data, the medical history database being connected to the cause logic such that the cause logic is provided with patient medical history data and the cause logic compares the morphology of the combined signal with a morphology of a previously acquired combined signal.

19. A pacing system comprising:

a pacemaker connected to the heart of a patient, the pacemaker periodically stimulating the heart;

an electrode array attached to the patient at locations suitable for acquisition of a combined signal including a biopotential signal from the heart and a pacer signal from the pacemaker;

an ECG monitor connected to the electrode array, the combined signal acquired by the electrode array being transmitted to the ECG monitor;

a malfunction detector applying a malfunction logic to the acquired combined signal, the malfunction logic identifying at least one pacing defect present in the combined signal and applying a morphology logic to the combined signal to identify a morphology of the combined signal, the morphology of the combined signal being indicative of a cause of the at least one pacing defect; and

an output generator connected to the malfunction detector, the output generator receiving an indication of the determined cause of the malfunction and producing an output indicative of the determined cause.

20. The system of claim 19 further comprising a cause logic that receives the identified at least one pacing defect from the malfunction logic and the identified morphology from the morphology logic, the cause logic determining a cause of the at least one pacing defect.

21. The system of claim 20 wherein the morphology logic comprises a plurality of morphology logics, a logic applied to the combined signal being selected from the plurality of morphology logics based upon the identified at least one pacing defect.

22. The system of claim 20 further comprising a medical history database, the medical history database comprising additional patient information;

the cause logic receiving the additional patient information from the medical history database and determining the cause of the at least one pacing defect based upon the identified at least one pacing defect, the identified morphology, and the additional patient information.