
Heart attack
A heart attack, medically called a myocardial infarction (MI), happens when blood flow to part of the heart muscle becomes severely reduced or blocked. Without enough blood and oxygen, the affected heart muscle begins to become damaged. A heart attack is a medical emergency. Fast treatment can restore blood flow, limit heart-muscle damage and improve the chances of recovery. The most commonly recognised symptom is chest discomfort, which may feel like pressure, squeezing, tightness, heaviness or aching. However, a heart attack does not always look the same in every person. Some people may mainly experience breathlessness, nausea, sweating, unusual tiredness, dizziness or discomfort in the arm, back, neck or jaw. Never wait for symptoms to become severe before seeking help.
