What does a mark on the marker chain tell you?

What does a mark on the marker chain tell you?

• A. Sensed or Paced event by the device
• B. Battery status
• C. Lead integrity fault
• D. System reboot

Answer: (A)

A marker on the marker chain represents a timing event identified by the device—specifically, a sensed intrinsic beat or a paced beat. Each mark lines up with what the device detected or delivered, so you can tell whether a given beat on the electrogram came from the heart’s own rhythm or from the pacer as the impulse was delivered. This is crucial for assessing capture and pacing behavior, since you can verify that pacing occurs at the intended times and that intrinsic beats are being sensed correctly. Markers are not used to show battery status, lead integrity faults, or system reboots, which are indicated by other diagnostic cues or device telemetry rather than the marker chain.

A marker on the marker chain represents a timing event identified by the device—specifically, a sensed intrinsic beat or a paced beat. Each mark lines up with what the device detected or delivered, so you can tell whether a given beat on the electrogram came from the heart’s own rhythm or from the pacer as the impulse was delivered. This is crucial for assessing capture and pacing behavior, since you can verify that pacing occurs at the intended times and that intrinsic beats are being sensed correctly. Markers are not used to show battery status, lead integrity faults, or system reboots, which are indicated by other diagnostic cues or device telemetry rather than the marker chain.