system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Aspirin saves lives in during a heart attack

ELI5, how does aspirin save lives during a heart attack?  The only information I've found online is either "it stops clotting and reduces the size of a clot" or really technical medical terminology.  As a first responder, I've physically seen someone "get better" after chewing aspirin when having the textbook signs and symptoms of a heart attack and I'd like to know how it works.
gpt
Heart attack = clogged artery 

Platelets in your blood stick together to form a blood clot. Aspirin is an anti-platelet, hence it decreases the blockage that may be causing irreversible damage to a person by the minute.

Blood thinner is a layman term. But really there are anti-coagulants (ex. Warfarin) and anti-platelets (ex. Aspirin) that targets different mechanisms of the ‘clot formation’ process.