Heart Attack vs. Cardiac Arrest: Key Differences
People often use the terms "heart attack" and "cardiac arrest" interchangeably, but they are not the same thing. Understanding the difference can be life-saving. At LifeCare Hospitals, our cardiology and emergency teams are trained to respond rapidly to both, but the first response you provide at home or in public depends on knowing what is happening. In short: a heart attack is a circulation problem, while cardiac arrest is an electrical problem.
What is a Heart Attack?
A heart attack (myocardial infarction) occurs when blood flow to the heart is blocked. If the blocked artery is not reopened quickly, the portion of the heart normally nourished by that artery begins to die.
- Symptoms: Chest pain or pressure, radiating pain to the arm, back, or jaw, shortness of breath, and cold sweats. (Read more on Acidity vs. Heart Attack).
- Consciousness: The person is usually conscious during a heart attack.
- Risk Factors: High blood pressure, high cholesterol, and Diabetes.
What is Cardiac Arrest?
Cardiac arrest occurs suddenly and often without warning. It is caused by an electrical malfunction in the heart that causes an irregular heartbeat (arrhythmia), leading the heart to stop pumping blood to the brain and lungs.
- Symptoms: Sudden collapse, loss of consciousness, and no breathing or pulse.
- Consciousness: The person becomes unconscious immediately.
- Immediate Action: Requires CPR (Cardiopulmonary Resuscitation) and the use of a defibrillator (AED) immediately.
Key Differences at a Glance
| Feature | Heart Attack | Cardiac Arrest |
|---|---|---|
| Cause | Bloackage (Circulation) | Electrical Malfunction |
| Onset | Can be gradual or sudden | Sudden and instantaneous |
| Immediate Pulse | Usually present | Absent |
The Link: Can a Heart Attack Lead to Cardiac Arrest?
Yes. A heart attack is a major risk factor for cardiac arrest. When the heart muscle is damaged by a lack of oxygen during an attack, it can disrupt the heart's electrical system, leading to sudden cardiac arrest. This is why immediate medical attention at LifeCare Emergency Units is critical during a heart attack.
What to Do in an Emergency
- If you suspect a heart attack: Call for an ambulance immediately (LifeCare Ambulance: +254 730 950 000). Keep the person calm and wait for professional help.
- If you see someone in cardiac arrest: Call for help, start CPR immediately, and ask someone to find an AED. Every second counts.
Conclusion: Knowledge and Speed Save Lives
Being able to identify the signs of these two distinct cardiac events can make the difference between a life saved and a tragedy. The cardiology experts at LifeCare Hospitals are dedicated to both prevention and rapid response, ensuring your heart is always in the best possible hands.
Frequently Asked Questions (FAQs)
Can cardiac arrest happen to young, healthy people?
While rare, it can happen, often due to undiagnosed heart conditions or extreme physical trauma. This is why heart screenings are important even for athletes.
Should I give aspirin to someone in cardiac arrest?
No. Aspirin is used for heart attacks to help blood flow. In cardiac arrest, the person is unconscious and cannot swallow; immediate CPR is the only priority.