No.

Yes, you do remember when you are abut to have a panic attack. You can also remember everything going on around you when you are having the panic attack.

I don't think so

Yea, if your heart is weak,you may die of a panic attack.

Webmd.com has a great selection on panic disorder information. Articles range from how to realize you are having a panic attack to how to stay calm and collected during a panic attack until it passes.

A panic attack is caused by a sudden and overwhelming feeling of anxiety or fear. They may also be linked to other disorders, such as panic disorders, social phobia, or depression.