Please describe a heart attack from personal experience?

Well I am writing a short story for English and one of the characters has a heart attack. The teacher said that it was not realistic enough so I was wondering if someone would be kind enough to share their personal experience with a heart attack. All feelings, emotions, noises, thoughts, etc. should be included if possible. Go into as much detail as necessary. I would really appreciate it. Thanks!

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Answer:
An old Greek man I worked with once described his heart attack as feeling like a woman standing on his chest wearing stilletos, which I took as meaning a great pressure on the chest near the heart, hope this helps.

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Answer:
This Patient Guide is written for the loved ones of heart patients who are dealing with the short-term stress that comes with a test, procedure or recent diagnosis of heart disease. It explains why support is so important to a loved one with heart disease. It also offers practical strategies on how to support a loved one while also taking care of yourself.