If you notice some of these symptoms, you need to go the doctor. Even if you are not sure, better safe than sorry.
Medications can also help to restore the function of the heart and they can give you a bigger chance at survival. So, all in all, if you want to be prepared for a heart attack, you need to take care of your health. Now that you know the problems, you need to be more careful. You should also not smoke, neither from a second-hand smoke. Just eat healthier, monitor the cholesterol and exercise regularly to lower stress. You have only one life, so live it to the fullest!