Ok I am 17 year old male an 3 days ago I almost had a heart attack but my brother manage to keep me from having it, But we don't know why.

You need to talk this through with an actual doctor.

I would but only 17 an can't get any where so hints way I'm using the internet.

Hints why*

It's impossible to make any kind of diagnose, without knowing your full medical history and conducting a physical examination.

It's impossible to make any kind of diagnose, without knowing your full medical history and conducting a physical examination.

Very very true but it's like I was just what'ing TV next thing I no my bro is doing cpr on me so it's got me scared as an being 17 I didn't think I could have a heartattack at this age

1. How did you almost have one ?

2. how did your brother stop it ?
** you can't really stop a heart attach,

Perhaps a heart ailment, blood pressure issue, a defect.
You need a complete exam