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Difference Between Heart Attack and Myocardial Infarction

Understand the difference between a heart attack and myocardial infarction. Learn how the terms are related, what causes them, and why early treatment is critical for heart health.

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Written by Dr. Siri Nallapu

Reviewed by Dr. Md Yusuf Shareef MBBS

Last updated on 21st Aug, 2025

When it comes to heart health, terms like heart attack and myocardial infarction are often used interchangeably. However, while they are closely related, they are not exactly the same. Understanding the difference can help you recognise symptoms early and seek timely medical care.

What is a Heart Attack?

A heart attack (medically known as a myocardial infarction) occurs when blood flow to a part of the heart muscle is blocked, usually due to a blood clot. Without oxygen-rich blood, the affected heart muscle begins to die.

Symptoms of a Heart Attack

Heart attack symptoms can vary, but common signs include:

  • Chest pain or discomfort (often described as pressure, squeezing, or heaviness)
  • Pain spreading to the arms, neck, jaw, back, or stomach
  • Shortness of breath
  • Cold sweat, nausea, or dizziness
  • Fatigue or sudden weakness

Note: Some people, especially women, may experience atypical symptoms like indigestion, extreme fatigue, or pain in the upper abdomen.

What is Myocardial Infarction?

Myocardial infarction (MI) is the medical term for a heart attack. It specifically refers to the death of heart muscle tissue due to lack of blood supply.


Types of Myocardial Infarction

1. STEMI (ST-Elevation Myocardial Infarction): A severe type where a major artery is completely blocked.
2. NSTEMI (Non-ST-Elevation Myocardial Infarction): A partial blockage that still damages the heart muscle.

Key Differences Between Heart Attack and Myocardial Infarction

Aspect

Heart Attack

Myocardial Infarction

Definition

General term for reduced blood flow to the heart

Medical term for heart muscle damage caused by blocked blood flow

Severity

Can range from mild to severe

Usually indicates significant and irreversible heart damage

Diagnosis

Based on symptoms and ECG changes

Confirmed by blood tests (troponin levels) and ECG findings

Types

Includes angina (chest pain without permanent damage)

Classified into STEMI (full blockage) or NSTEMI (partial blockage)

What Causes a Heart Attack or Myocardial Infarction?

The most common cause is coronary artery disease (CAD), where plaque (fatty deposits) builds up in the arteries, narrowing them. A blood clot can then block blood flow, leading to a heart attack.

Risk Factors

  • High blood pressure
  • High cholesterol
  • Diabetes
  • Smoking
  • Obesity & sedentary lifestyle
  • Family history of heart disease
  • Stress & excessive alcohol use

How to Prevent a Heart Attack?

Here’s how to prevent or manage a heart attack:

Lifestyle Changes

  • Eat a heart-healthy diet (fruits, vegetables, whole grains, lean proteins).
  • Exercise regularly (at least 30 minutes daily).
  • Quit smoking & limit alcohol.
  • Manage stress (yoga, meditation, deep breathing).
     

Medical Management

  • Control blood pressure & cholesterol.
  • Take prescribed medications (aspirin, statins, beta-blockers if needed).
  • Regular heart check-ups (especially if you have risk factors).

When to Seek Emergency Help?

If you or someone experiences:

  • Severe chest pain lasting more than a few minutes
  • Difficulty breathing
  • Fainting or extreme dizziness

Call emergency services immediately! Quick treatment can save lives.

Need a Heart Check-Up?

If you have risk factors or symptoms, consult a cardiologist. Apollo 24|7 offers:

  • Expert cardiology consultations
  • ECG, blood tests, and advanced heart scans
  • Personalised treatment plans

Book an appointment today and take charge of your heart health!

Conclusion

While heart attack and myocardial infarction are often used similarly, knowing the difference helps in understanding medical reports and treatment options. The key takeaway? Early action saves lives! Pay attention to symptoms, adopt a heart-healthy lifestyle, and seek medical advice when needed.


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