Heart attack

What is a heart attack, how is it caused, and how can it be treated or prevented?
This site,
http://bodyandhealth.canada.com/channel_condition_info_details.asp?channel_id=1055&disease_id=163&relation_id=17519
Offers a very detailed explanation of what exactly a heart attack is.
When the myocardium, which is the muscle that pumps the heart does not receive oxygen because a blot clot in an artery is preventing the flow of blood.
Symptoms include fatigue, shortness of breath as well as chest pain. These are signs that may lead up to a heart attack.
Irregular heart beats are also very common and may lead to death, such as when the left ventricle does not properly pump blood to the body.
Fun fact; less severe heart attacks can often be mistaken for heart burn.
This website,
http://www.nhlbi.nih.gov/health/health-topics/topics/heartattack/causes.html
Explains causes such as drug use, stress, smoking and of course poor diet that can lead to heart attacks.


And this site also shows an interesting video showing the two main causes.





While I understood that clogged arteries is often a cause of heart attacks, I was interested to discover that it is the coronary arteries (the arteries on the surface of the heart supplying blood to the muscle itself) that may cause this disruption of the heart's rhythm.