Often mistaken for one sudden cardiac arrest (SCA) is not a heart attack but can occur in a person who has survived a heart attack.
Heart Attack stems from a circulation or plumbing problem of the heart. It is caused by blockage in one or more of the arteries, preventing the heart from receiving enough oxygen-rich blood. If the oxygen in the blood cannot reach the heart muscle, it becomes damaged. The risk factors for a heart attack are high cholesterol, high blood pressure, obesity, smoking, diabetes, family history of heart attack. Heart attack is likely to be accompanied by pressure in the chest, sweating, pain radiating to the arms, shortness of breath, nausea.
Sudden Cardiac Arrest (SCA) on the other hand is an electrical problem with the heart that triggers a dangerously fast heart rhythm. It is caused by the electrical malfunction of the heart that results in no blood flow to the body and brain. The risk factors for sudden cardiac arrest are a low ejection fraction, heart failure, previous heart attack or family history of SCA. Sudden cardiac arrest often occurs with no warning. Sometimes other signs and symptoms precede sudden cardiac arrest. These may include fatigue, fainting, blackouts, dizziness, chest pain, shortness of breath, weakness, palpitations or vomiting.