Myocardial infarction or heart attack is an absolute medical emergency . It is the world's leading cause of death according to WHO. In 2012, it accounted for 13% of deaths worldwide.
A myocardial infarction is the tissue death of a part of an organ related to a sudden stop of the arterial vascularization. In myocardial infarction, part of the heart muscle becomes necrotic and can no longer function. Involved: the sudden stop of the vascularization by one or more of the coronary vessels.
Most often, it is a thrombus (clot) that clogs one of the coronary arteries (nourishing arteries of the heart). The muscle downstream of this artery is no longer irrigated, no longer receives oxygen and evolves to necrosis ... if nothing is done in the hours that follow.
The myocardium, muscle of the heart, sends to each contraction the blood in the great circulation. Thus all organs of the body are irrigated and supplied with oxygen.
Chest pain is the major sign of myocardial infarction. The pain can radiate to the jaws, arms and wrists (more often to the left). These pains can be accompanied by nausea. A myocardial infarction is most often preceded by angina pectoris, which signs a gradual narrowing of the inner caliber of one or more arteries. In angina pectoris, the pain does not last, and gives way to rest. She is also relieved by taking drugs (nitrates) that the patient has in principle always on him.
To know :
Chest pain is often associated with pain:
- in the left arm (56%),
- in the right arm (30%),
- between the shoulders (27%),
- and / or in the jaws (31%).
When a coronary artery becomes completely clogged, the pain does not stop and is not relieved or poorly relieved by taking nitrate drug: it is myocardial infarction. You must call a doctor without delay and do not move.
Despite the extraordinary improvement of the early management by the SAMU reachable at 15 (Emergency Medical Assistance Service) of this disease, a sudden death can unfortunately inaugurate a myocardial infarction before any intervention.
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