Post Box Change EGM Interpretation
Lead Cardiac Physiologist, St Georges University Hospitals NHS Foundation Trust
Disclosure: The author has no conflict of interests to declare.
An 86 year old female attended the device clinic for her 6 week post box change pacemaker check. On device interrogation, 310 AT/AF electrograms (EGMs) had been recorded. Figure 1 is representable of all available EGMs on the device.
Programmed device settings are displayed below.
Mode: AAI – DDD
Max Track: 120 bpm
Mode Switch: 171 bpm
RA sensitivity: 0.9 mV
Sensed AV Delay: 200 ms
Lower Rate: 60 bpm
Max Sensor: 120 bpm
PVARP: 250 ms
RV sensitivity: 2.8 mV
Paced AV Delay: 230 ms
Figure 1: AT/AF stored EGM. Channel 1: Atrial Bipolar EGM, Channel 2: Ventricular Bipolar EGM, Channel 3: Device Markers.