Cat 1 — 60-year-old male collapsed suddenly, bystander CPR in progress, AED attached by security.
On arrival
Patient supine, bystander performing chest compressions, public access AED has delivered one shock already advising 'shock advised' on second analysis.
Initial observations
Rhythm
On the monitor — interpret the strip below
CPR quality
Bystander compressions adequate rate and depth
Airway
Managed with supraglottic device
EtCO2
3.2 kPa initially
Pulse
Absent
Time down
Approximately 4 minutes before bystander CPR
Monitor, lead II — rhythm check after the AED shock
Interpret the trace yourself — the mark sheet expects your rate, rhythm, axis and ST analysis, not a written finding.