Difference Between Heart Attack and Cardiac Arrest!

By Dhwani Jerajani +2 more


Heart attack and cardiac arrest are two of the most common heart conditions that lead to death in most cases. We often confuse the two terms and even use them interchangeably at times. These two conditions are very different and to understand their differences, we spoke to Senior Consultant Cardiologist, Dr Salil Shirodkar at Nanavati Hospital, Mumbai and Senior Interventional Cardiologist & Electrophysiologist at Narayana Hospital, Dr Kapil Kumawat.

A guy experiencing pain in chest - Difference between heart attack and cardiac arrest

The primary difference between a heart attack and a cardiac arrest, the causes for each of the conditions and how a heart attack can be prevented are explained concisely by the cardiologists.

What is a heart attack?

The heart is supplied by two coronary arteries – left coronary artery and the right coronary artery and their branches. A blockage in one of these branches leads to stoppage of blood flow to the heart muscle. This leads to a heart attack.

What is a cardiac arrest?

A cardiac arrest occurs when the heart stops beating suddenly. If a person develops cardiac arrest, they will lose consciousness and collapse. One of the major causes of cardiac arrest is a heart attack.

When the blockage occurs in the widowmaker artery, a large area of the heart muscle doesn’t receive adequate blood supply. This leads to a cardiac arrest.

Another critical reason for cardiac arrest is the degeneration of the electric cell. Heartbeats are generated by this electric cell and degeneration in one of those cells stops the heart impulses entirely.

What are the main causes of a heart attack?

The most common reasons that lead to a heart attack are:

1) Smoking

2) Alcohol


3) Old Age

4) Unhealthy food habits

5) Genetic Predisposition

6) Lack of exercise

7) Obesity

What are the main causes of a cardiac arrest?

Multiple causes can lead to a cardiac arrest. These are:


1) Degeneration of the electric cells

2) Heart Attack

3) Heart muscle problems such as cardiomyopathy

4) Electrolyte abnormalities – A sudden increase or decrease in the potassium level in the body

5) A sudden blow to the chest

6) Very slow rhythm or a sudden fast rhythm

7) Genetic Predisposition

A heart attack can be prevented

Yes, a heart attack can be prevented by maintaining a healthy lifestyle. Dr. Shirodkar recommends following a healthy diet, exercising on a regular basis, reducing stress and keeping drinking and smoking to a minimum for the good health of your lungs and heart. Poor health of lungs inversely affects your heart health too.


Patients who suffer from diabetes and cholesterol should keep those two factors in check as well.

A cardiac arrest cannot be prevented

Although a cardiac arrest cannot be prevented as it can occur due to multiple factors, Dr Kumawat suggests that each patient is different and they require an individual evaluation to find out if they are at risk of having a cardiac arrest.

Patients with prior heart problems should consult with their treating doctor and understand if they require an ICD (Implantable Cardioverter Defibrillator). This is also applicable to patients who have undergone a successful surgery or angioplasty.

It is clear that in an emergency situation, a specific medication won’t be of any help because cardiac arrest is a condition wherein the heart stops beating all of a sudden. Yet, Dr. Kumawat urges patients to carry their routine cardiac medications while traveling and in similar situations.

First Aid

As a form of first aid, if a person is having a cardiac arrest, bystanders can quickly provide BCLS (Basic Cardiac Life Support) that includes a cardiac massage and defibrillation using an AED (Automated Cardioverter Defibrillator). An AED is easily available in public places such as airports, aircraft, malls, etc. For this reason, everyone should learn how to give BCLS and use an AED. Be aware of the general symptoms of a poor heart so that you can be well prepared if any misfortune happens in the future. Also remember these symptoms differs from men to women, hence get your research done for both.

Also  Read: First Aid Treatment for Heart Attack


Now that we know the primary differences between a heart attack and a cardiac arrest, we can use these terms undoubtedly. It is important to enjoy life, have new experiences and make unforgettable memories, but at the same time, ensure that you take care of your heart and follow tips for a healthy heart. This will surely prevent undesirable heart conditions for long life.

Disclaimer: The information included at this site is for educational purposes only and is not intended to be a substitute for medical treatment by a healthcare professional. Because of unique individual needs, the reader should consult their physician to determine the appropriateness of the information for the reader’s situation.

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