On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Out-of-tolerance pacing timing caused by controls, batteries, cables, test setup, measurement configuration, or a device calibration or timing problem.
Step-by-Step Troubleshooting
1. Protect the Patient and Remove the Unit From Dependence
Do not troubleshoot suspected pacing-rate or pulse-width inaccuracies while a patient relies on the affected pacemaker. Transfer pacing support to another verified device.
Expected outcome: Patient care continues without dependence on potentially inaccurate pacing timing.
2. Confirm the Reported Measurement
Record the pacing channel, displayed setting, measured rate or pulse width, test equipment used, and whether the discrepancy is repeatable.
Use only the applicable manufacturer specifications when determining whether performance is outside tolerance.
Expected outcome: A reproducible measurement discrepancy is established.
3. Verify Battery Condition
Install known-good approved batteries if power condition is uncertain.
Expected outcome: Timing measurements are performed with stable device power.
4. Inspect Patient and Test Cables
Inspect the pacing cable, analyzer cable, adapters, connectors, and receptacles for poor seating, damage, or contamination.
Expected outcome: The signal path between pacemaker and analyzer is secure and intact.
5. Verify the Analyzer Configuration
Confirm that the pacing analyzer is configured correctly for the channel and parameter being measured. Inspect its leads and confirm calibration status according to facility requirements.
Expected outcome: The test equipment is suitable for an accurate timing measurement.
6. Compare With a Known-Good Test Setup
When practical, verify the analyzer and cabling using another known-good pacemaker or an alternate approved measurement setup.
Expected outcome: The measurement system itself is not creating the apparent discrepancy.
7. Verify Control Response
Adjust the pacing rate or applicable control through normal clinical settings and confirm that the displayed value changes consistently without jumping, sticking, or missing inputs.
Expected outcome: Controls operate predictably and the selected setting is stable.
8. Measure Pacing Rate and Pulse Width
Using approved test equipment, measure rate and pulse width according to the applicable Medtronic procedure.
Do not substitute invented tolerances or unauthorized calibration adjustments.
Expected outcome: Measured values fall within the manufacturer-defined requirements.
9. Repeat Measurements
Repeat the test at appropriate verification points specified by approved documentation to distinguish a single setup error from a persistent device problem.
Expected outcome: Measurements remain repeatable and within tolerance. If so, troubleshooting can stop after full functional verification.
10. Escalate Persistent Timing Errors
If rate or pulse width remains outside tolerance with verified batteries, connections, controls, and calibrated test equipment, remove the device from service.
Expected outcome: A potential timing, calibration, or control-system fault is referred for qualified evaluation.
If the Problem Persists
External power, cabling, controls, and measurement-system causes have been ruled out. The remaining fault may involve internal timing, calibration, output-control, or processing functions requiring service-level evaluation.
Remove the pacemaker from service, label it Out of Service, and send it for qualified repair using approved Medtronic documentation and calibrated pacing test equipment. Complete rate, pulse-width, output, sensing, and alarm verification before return to service.
Clinical Use Tip
Pacing that is present but delivered at the wrong timing parameters cannot be treated as verified therapy.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported concern that the ventricular pacing rate did not match the selected setting."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering confirmed an out-of-tolerance rate measurement on calibrated pacing test equipment after verifying batteries, cables, and control operation."
Resolution
What action was taken.
Example:
"The pacemaker was removed from service and referred for qualified repair because pacing-rate accuracy remained outside the applicable manufacturer requirement."
Helpful Details to Include (If Known)
- Atrial or ventricular channel
- Displayed setting
- Measured rate
- Measured pulse width
- Applicable test equipment
- Calibration status of analyzer
- Battery condition
- Cable and connector condition
- Repeatability of measurements
- Final device status
Final Thought
Accurate pacing timing must be measured with a verified setup, and persistent discrepancies require removal from service rather than unapproved calibration or internal adjustment.
That is successful troubleshooting.