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What is a heart attack?

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Heart attack is the death of a segment of heart muscle caused by the loss of blood supply. The blood supply is usually lost because a coronary artery, one that supplies blood to the heart muscle, is blocked by a blood clot (coronary thrombosis).  If some of the heart muscle dies, the patient experiences chest pain and electrical instability of the heart muscle tissue. Heart Attack Symptoms Symptoms of a heart attack include: ·   Discomfort, pressure, heaviness, or pain in the chest, arm, or below the breastbone ·   Discomfort radiating to the back, jaw, throat, or arm ·   Fullness,  indigestion , or choking feeling (may feel like  heartburn ) ·   Sweating ,  nausea ,  vomiting , or  dizziness ·   Extreme  weakness ,  anxiety , or shortness of breath ·   Rapid or irregular heartbeats What Do I Do if I Have a Heart Attack? After a heart attack, quick treatment to open the blocked artery is essential to lessen the amount of damage. At th