Advanced first aid 20 years ago. Re-certified every 2 or 3 years since.
The certification I did 2 years ago was St John's and included defibrillators.

Every time you get certified they will be emphasising different things.

In the Early 90s they were really concerned about preventing neck and spine injury so they concentrated on safe handling and immobilization methods.
5 years ago it was EMT personel training us and they spent two days teaching about scene managment and triage. Then focussed the third day on oxygen supply, blood loss and shock.

This time it was definitely about heart attacks and defibrillators. One day of ABCs and two days of cardiac arrest.

Hopefully if anything happens I can help you stay alive until the real medics get to you.