Heart Attack vs. Cardiac Arrest: What’s the Difference?

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Many people use the terms heart attack and cardiac arrest interchangeably, but they’re actually two very different — and equally serious — medical emergencies. Knowing the difference can save a life and help you respond appropriately in a crisis.

In this article, we’ll break down what sets these conditions apart, what causes them, and what to do when either occurs.

What Is a Heart Attack?

A heart attack (also known as a myocardial infarction) occurs when blood flow to the heart muscle is blocked, usually by a buildup of plaque in the coronary arteries. Without blood flow, part of the heart begins to die.

Common symptoms of a heart attack include:

  • Chest pain or discomfort (pressure, squeezing, or fullness)

  • Pain in the arms, jaw, neck, or back

  • Shortness of breath

  • Nausea or lightheadedness

  • Cold sweat

A person experiencing a heart attack is usually still conscious and breathing, though they may be in extreme discomfort.

What Is Cardiac Arrest?

A cardiac arrest occurs when the heart suddenly stops beating altogether due to an electrical malfunction. As a result, blood flow to the brain and other vital organs stops almost immediately.

Signs of cardiac arrest:

  • Sudden collapse

  • No pulse

  • No breathing

  • Loss of consciousness

Cardiac arrest happens without warning and is immediately life-threatening. It requires CPR and defibrillation (using an AED) within minutes to prevent death.

Key Differences at a Glance

Feature Heart Attack Cardiac Arrest
Cause Blocked blood flow to the heart Electrical failure causes heart to stop beating
Symptoms Chest pain, shortness of breath, nausea Sudden collapse, no pulse, no breathing
Consciousness Often conscious Always unconscious
Emergency Response Call 911, give aspirin, stay calm Call 911, start CPR, use an AED if available

How They’re Connected

A heart attack can lead to cardiac arrest if the damage disrupts the heart’s electrical system. However, not all heart attacks result in cardiac arrest, and not all cardiac arrests are caused by heart attacks (they can also be due to arrhythmias, trauma, or drug overdose).

Prevention and Risk Management

Preventing both heart attacks and cardiac arrest involves managing your cardiovascular health:

  • Quit smoking

  • Eat a heart-healthy diet

  • Exercise regularly

  • Monitor blood pressure, cholesterol, and blood sugar

  • Manage stress effectively

Men experiencing heart-related complications like erectile dysfunction often find it linked to poor blood flow — sometimes treated with medications such as Fildena extra power 150 — but the root issue is often cardiovascular. Taking steps to protect your heart can prevent both ED and more serious complications like heart attack and cardiac arrest.

Final Thoughts

While heart attack and cardiac arrest are different, both are medical emergencies that require quick action. Knowing how to spot the signs — and respond — could save your life or someone else’s. Stay informed, take care of your heart, and never ignore the warning signs.

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