Myocardial infarction causes?

Many poss causes. Almost all heart attacks are the result of fatty deposits on the inside of arteries that break open and cause clotting which will blocks the artery (and the blood from flowing to the part of the heart the artery feeds). Family history, fatty diet, smoking, high blood pressure, diabetes and other disorders can all contribute to this process.
Heart cell death. Myocardial infractions happen when heart muscle dies from lack of oxygen delivered by blood. This can happen when plaque deposits in the vessels rupture and cause total blockage of a vessel. It can also happen if there is a narrowing of the vessel severe enough that oxygen delivery is far below demand (especially if oxygen demand is increased).

Related Questions

Is myocardial infarction caused by an infection?

No. Well i shouldn't be so definite. Who would have thought that ulcers would be caused by infection. There has been noted to be an increase in heart attacks related to certain infections including those involving the gums, so the cause and effect question has been raised. It has been suggested that inflammation plays a role. But at this time i think most doubt the cause and effect relationship. Read more...
Not typical. The heart damage is caused by poor blood flow in diseased vessels around the heart and eventually an obstruction to blood flow to an area of the heart. There is something called viral myocarditis but this would not typically increase your risk for a heart attack. Read more...

I have a question about myocardial infarction: is it caused by atherosclerosis?

Atherosclerosis MI. Atherosclerosis-hardening of the arteries due to cholesterol plaque buildup - the plaques are made up of fat, collagen, muscle cells and blood cells. The plaques rupture - lead to clot formation - thereby clogging the arteries. Decreasing blood supply to heart muscle. Read more...

How does hypertension cause myocardial infarction?

Work of heart. Too high of a pressure increases heart work and aggravates coronary disease or muscle dysfunction. Read more...
Atherosclerosis. Depends on one's personal risks smoking, obesity, hypertension, hyperlipemia, diabetes , family history. Simply, one blocks the feeding coronary artery to part of the heart muscle and low flow, or no flow causes ischemia which cause death of the heart cells, which is a heart attack! myocardial infarction is the medical term.Ekg and lab tests show the damage. Read more...

Does ischaemia or thrombosis cause myocardial infarction?

Ischemia vs MI. Cholesterol plaque develops in the heart arteries. Progressive narrowing - usually greater than 70% - can lead to lack of blood flow to the heart muscle during exercise or rest and causes angina or ischemia. Myocardial infarction is due to the rupture of a plaque which causes a blood clot to form (thrombosis) in the artery blocking blood flow to that area of the heart muscle which then dies. Read more...

Hello doc. .. could deep vein thrombosis cause myocardial infarction?

No. But it can cause pulmonary embolism or migration of the clots to lungs. Clinically sometimes hard to differentiate, totally different conditions otherwise. Read more...

What can cause a myocardial infarction at age 30?

Heart attack. Premature coronary artery disease of atherosclerotic type can cause mi in young people, smoking, cocaine, inflammatory heart disease, some hyperthrombotic diseases, while uncommon that young, it definitely happens. Read more...