Cardiac Arrest vs. Heart Attack: Understanding the Difference

Many people use the terms heart attack and cardiac arrest interchangeably, but they are different medical emergencies.

Although both require immediate treatment, they have different causes, symptoms, and emergency responses. Knowing the difference can help you recognize the warning signs and act quickly.

What Is a Heart Attack?

A heart attack, or myocardial infarction, occurs when blood flow to part of the heart muscle is blocked, usually by plaque or a blood clot in a coronary artery.

Without oxygen-rich blood, the heart muscle begins to suffer damage. Unlike cardiac arrest, the heart usually continues beating during a heart attack.

Common risk factors include:

• High blood pressure
• High cholesterol
• Smoking
• Diabetes
• Obesity
• Physical inactivity
• Family history of heart disease
• Increasing age and chronic stress
  
  

Heart Attack Symptoms

Symptoms may develop gradually or begin suddenly and can include:

• Chest pain, pressure, or tightness
• Pain that spreads to the arm, jaw, neck, back, or stomach
• Shortness of breath
• Cold sweats
• Nausea or lightheadedness
• Unusual fatigue, especially in women

What Is Cardiac Arrest?

Cardiac arrest occurs when the heart's electrical system suddenly malfunctions, causing the heart to stop pumping blood effectively.

Blood flow to the brain and other organs stops almost immediately, making cardiac arrest life-threatening within minutes without treatment.

Cardiac arrest may result from coronary artery disease, inherited rhythm disorders, structural heart disease, or damage from a previous heart attack. In some cases, it occurs without warning.

Cardiac Arrest Symptoms

Warning signs are often minimal because cardiac arrest happens suddenly. Symptoms may include:

• Sudden collapse
• Loss of consciousness
• No pulse
• No breathing or only gasping breaths
• Occasionally, chest discomfort, dizziness, or palpitations just before collapse

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

The easiest way to remember the difference is plumbing versus electricity.

A heart attack is a circulatory problem caused by a blocked artery. Cardiac arrest is an electrical problem that causes the heart to stop beating effectively.

While a heart attack can sometimes trigger cardiac arrest, they are not the same condition.

Key differences include:

• Onset: Heart attack symptoms often develop over minutes or hours. Cardiac arrest happens suddenly.
• Consciousness: People having a heart attack are usually awake. People in cardiac arrest lose consciousness almost immediately.
• Heartbeat: The heart continues beating during most heart attacks but stops pumping effectively during cardiac arrest.
• Breathing: Heart attack patients usually continue breathing. Cardiac arrest often causes breathing to stop or become irregular.
• Emergency response: Both require 911, but cardiac arrest also requires immediate CPR and, if available, an automated external defibrillator (AED).

How Are They Treated?

Heart Attack Treatment

Treatment focuses on restoring blood flow as quickly as possible. This may include medications to dissolve clots, angioplasty to open blocked arteries, or bypass surgery.

Long-term care often includes medications, cardiac rehabilitation, and healthy lifestyle changes.

Cardiac Arrest Treatment

Cardiac arrest requires immediate CPR to keep blood flowing until the heart can be restarted with an AED or advanced medical care.

Survivors often need additional testing to identify the cause and may require a pacemaker or implantable cardioverter-defibrillator (ICD).

When to Seek Emergency Care

Both heart attack and cardiac arrest are medical emergencies. Never wait to see if symptoms improve, and do not try to drive yourself to the hospital.

Call 911 immediately if you or someone else experiences:

• Chest pain, pressure, or tightness lasting more than a few minutes
• Pain spreading to the arm, jaw, neck, or back
• Sudden shortness of breath
• Sudden collapse or loss of consciousness
• No pulse or no normal breathing
• Severe dizziness, cold sweats, or nausea with chest discomfort

If someone is unresponsive, begin CPR immediately and use an AED if one is available while waiting for emergency responders.

Schedule a Heart Health Evaluation

Understanding the difference between a heart attack and cardiac arrest can save a life, but prevention remains the best approach.

Regular cardiovascular evaluations can identify risk factors early and help prevent serious heart problems.

If you have symptoms, a family history of heart disease, or concerns about your heart health, schedule an evaluation with The Cardiovascular Center of Florida.

Our team provides comprehensive heart care to help you reduce your risk and protect your long-term health. Contact us today to schedule an appointment.