HomeMedicine & HealthDiseases & ConditionsWhat is Heart Attack (Myocardial Infarction)?
Medicine & Health·2 min·Updated Mar 12, 2026

What is Heart Attack (Myocardial Infarction)?

Myocardial Infarction

Quick Answer

A heart attack, also known as a myocardial infarction, occurs when blood flow to a part of the heart is blocked, usually by a blood clot. This blockage can damage or destroy heart muscle tissue, leading to serious health complications or death if not treated promptly.

Overview

A heart attack happens when the blood supply to part of the heart is interrupted, causing damage to the heart muscle. This is often due to a buildup of fatty deposits, known as plaque, in the arteries, which can rupture and form a clot. When the heart muscle does not receive enough oxygen-rich blood, it can start to die, which can lead to severe health issues or even death if not treated quickly. Understanding how a heart attack works is crucial because it highlights the importance of maintaining heart health. For example, someone might experience chest pain or discomfort, which is a common symptom of a heart attack. Recognizing these signs early can save lives, as immediate medical attention is vital for restoring blood flow to the heart. Heart attacks are significant because they are a leading cause of death worldwide. They can affect anyone, regardless of age or gender, but certain factors like obesity, smoking, and lack of exercise can increase the risk. By promoting heart-healthy habits, such as regular exercise and a balanced diet, many heart attacks can be prevented.


Frequently Asked Questions

The main symptoms of a heart attack include chest pain or discomfort, shortness of breath, and pain in the arms, back, neck, or jaw. Some people may also experience nausea or lightheadedness.
Heart attacks can be prevented by maintaining a healthy lifestyle, which includes eating a balanced diet, exercising regularly, and avoiding smoking. Regular check-ups with a healthcare provider can also help manage risk factors like high blood pressure and cholesterol.
If you think someone is having a heart attack, call emergency services immediately. While waiting for help, encourage the person to sit down, stay calm, and chew an aspirin if they are not allergic, as this can help thin the blood.