There are several causes of chest pain. Anyone who develops severe chest pain should call for an ambulance immediately because the symptoms may be due to a clot in the blood vessels supplying the heart and immediate treatment involves limiting the damage to the heart muscle itself.

The link below gives the following answers:

What is a myocardial infarction?
Understanding the heart and coronary arteries
What happens when you have a myocardial infarction?
What causes myocardial infarction?
Who is at risk of having a myocardial infarction?
What are the symptoms of a myocardial infarction?
What should I do if I suspect I am having a myocardial infarction?
How is a myocardial infarction diagnosed and assessed?
What is the treatment for myocardial infarction?
Treatment after you have had a myocardial infarction
How serious is a myocardial infarction?
After having a myocardial infarction
Appendix: what is acute coronary syndrome?
Further sources of information and help

MYOCARDIAL INFARCTION

COUNTRY : UK

“Myocardial infarction (MI) is usually caused by a blood clot that stops blood flow in a heart (coronary) artery. You should call for an ambulance immediately if you develop severe chest pain. Treatment with a ‘clot busting’ drug or an emergency procedure to restore the blood flow through the blocked artery are usually done as soon as possible to prevent damage to your heart muscle. Other treatments help to ease the pain and prevent complications. Reducing risk factors can help to prevent an MI.”

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