How to use a defibrillator (AED) during cardiac arrest

Picked one by one from a mixed channel. Transcript check: both title readers certain; 5 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only explainer videos that teach how the heart works, what specific cardiovascular conditions, symptoms, medications, procedures or surgeries are, or practical recovery guidance (e.g. the heart attack recovery chapter series). Exclude personal stories, appeals, campaigns, workouts, crafts, live sessions and webinars.