Heart Attack

A heart attack (medically referred to as myocardial infarction) is the death of part of the heart muscle due to a sudden loss of blood supply. Generally, the loss of blood supply is caused by a complete blockage of a coronary artery by a blood clot.  A heart attack causes chest pain and electrical instability of the heart muscle tissue.  This instability of the heart causes ventricular fibrillation, or chaotic electrical disturbance.  Orderly transmission of electrical signals in the heart is essential for regular beating of the heart, and pumping of blood.  A heart undergoing ventricular fibrillation simply spasms, and is unable to pump or deliver oxygenated blood to the brain.  Permanent brain damage and/or death can within five minutes unless the oxygen supply can be reestablished within five minutes.

A heart attack is caused by the formation of a blood clot on a cholesterol plaque located on the inner wall of an artery to the heart (coronary artery).  Risk of heart attack can be accelerated by smoking, high blood pressure, elevated cholesterol, and diabetes.  Chest pain or pressure is a common symptom of heart attack. Cardiac chest pain caused by a heart attack is often indistinct, or dull, and can be described as a pressure or band-like sensation, squeezing, heaviness, or other discomfort.  Heart attacks frequently occur between 4:00 A.M. to 10:00 A.M.  Approximately one quarter of all heart attacks are silent, or without chest pain.  The pain or discomfort of a heart attack is sometimes mild despite its ominous connotations.  Therefore, heart attack patients may attribute the symptoms to indigestion, fatigue, stress, or other common maladies.

Other Disease Information: Alzheimers, Arterial Plaque, Arteriosclerosis, Blood Clotting, Chest Pain, Cholestasis, Chronic Fatigue Syndrome, Circulatory System, Coronary Disease, Heart Attack, Disease, Heart Disease, Inflammatory Disorder, Mononucleosis, Obesity, Preeclamsia, Stroke, Vascular

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