Each year, more than 800,000 people in the United States experience a heart attack, with the majority caused by coronary artery disease (CAD). For more information, check out this CDC site: (https://www.cdc.gov/heart-disease/data-research/facts-stats/index.ht
Someone having a heart attack may:
Chest pain or discomfort. Most heart attack involve discomfort in the center or left side of the chest that last for more than a few minutes or that goes away and come back. The discomfort can feel like uncomfortable pressure, squeezing fullness or pain.
be breathless or gasping for breath.
be sweating profusely.
experience pain similar to indigestion.
collapse without warning.
complain of dizziness.
have pale skin and their lips may have a blue tinge.
have a rapid, weak or irregular pulse.
have a feeling of impending doom.
What to do:
Call 911 for emergency help straight away and tell them you think someone is having a heart attack. Start the CPR process.
Help move the individual into a comfortable position. The best position is on the floor, with their knees bent and their head and shoulders supported.
You could place cushion behind them or under their knees.
Keep monitoring the individual's level of response until emergency help.
source:
https://www.heart.org/en/about-us/heart-attack-and-stroke-symptoms