Use either defibrillator on the upper torso or chest. The AED is easier to operate; the manual device is faster and uses less power, but can fail and benefits from higher INT.
Automated device
The First Aid course says an AED resets fibrillation and stabilizes you for a while. Follow the device’s displayed steps. “For a while” matters: restoring rhythm does not replace lost blood or remove the cause of poor circulation.
Manual device
Match the power setting to the progress of fibrillation. The tutorial describes lower power early and higher power when the heart is close to stopping. Use the ECG and the visible power estimate, then charge and shock as directed.
The better the alignment, the higher the success chance. This is not a guaranteed result, and the source does not provide a single power setting that works for every state.
Check what caused it
Low blood pressure and very high heart rate can drive fibrillation in the course demonstration. Reassess circulation after the immediate rhythm problem improves. If the heart has already stopped, the course introduces epinephrine and an auto-pump as separate tools. Continue with heart-stoppage tools and blood pressure.
Sources & version notes
Reviewed against the primary sources below. Version-dependent details are identified in the article; these procedures have not been personally playtested.
- Developer release 1.0 English reference: tutorial, items and status text (2026-11-11 checked)
- Official Release 1.0 Patchnotes (2026-11-09)
Compiled from public sources. We have not personally played or tested these procedures. Check your installed build and its tooltips when details differ.