New Delhi, June 13 -- A heart attack, also known as myocardial infarction, occurs when blood flow to a portion of the heart suddenly gets blocked, typically by a clot in a coronary artery. Without oxygen-rich blood, the heart muscle in that area starts to die. Going by statistics, it is one of the leading causes of death in the world. Around 32 percent of all global deaths in 2019 were connected to cardiovascular diseases, according to the World Health Organization. Eighty five percent of these deaths were due to heart attack and stroke. Myocardial infarction can occur in the day or night. However, it happens more often in the early hours, if studies are to be believed.

Why do heart attacks happen in the morning?

There may be a higher r...