Heart attack: Study finds flu jab halves risk of death among survivors of cardiac arrest

Heart attacks occur when blood flow to the heart ends abruptly.

Normally this will be caused by a blood clot, but often there are reasons for the development of the blood clot.

Causes of heart attacks include coronary heart disease, drug misuse, and lack of oxygen in the blood.

The most common cause is coronary heart disease; a condition in turn caused by:
• Smoking
• A high-fat diet
• Diabetes
• High cholesterol
• High blood pressure
• Being overweight or obese
• Inactivity.