A heart attack happens when your heart cannot get enough oxygen because the blood flow is abruptly disrupted. The heart muscle cannot pump properly, and tissue rapidly begins to die.  About 735,000 Americans have a heart attack every year.
The diagram of heart is beneficial for Class 10 and 12 and is frequently asked in the examinations. A detailed explanation of the heart along with a well-labelled diagram is given for reference. The upper two chambers of the heart are called auricles.
Pay attention to chest pain. A pain in the chest, whether it’s sharp or dull, is the most common sign of a heart attack. People who are having heart attacks often say they feel squeezing, fullness, pressure, tightness, or a sharp sensation in the center or left area of the chest.