Understanding Cardiac Arrest: Symptoms, Causes, Diagnosis, and Prevention

What Is Cardiac Arrest?

Cardiac arrest is a sudden loss of heart function. It happens when the heart stops beating. As a result, blood cannot reach the brain and other organs. Without quick help, cardiac arrest can lead to death within minutes. According to the American Heart Association, cardiac arrest affects hundreds of thousands of people each year. Early action saves lives. Therefore, knowing the signs of cardiac arrest is very important.

Symptoms of Cardiac Arrest

Cardiac arrest symptoms often appear suddenly. However, some people may notice warning signs before it happens. Recognizing these signs can help save a life. Common symptoms include:

Sudden collapse or fainting

No pulse or heartbeat

No breathing or gasping for air

Loss of consciousness

Chest pain or discomfort (sometimes before collapse)

Feeling dizzy or lightheaded

Sometimes, people may feel tired or weak before cardiac arrest. But often, it happens without warning. For this reason, quick action is key.

Causes and Risk Factors

Many things can cause cardiac arrest. Most often, it is due to a problem with the heart’s electrical system. This can make the heart beat too fast, too slow, or stop. Common causes and risk factors include:

Coronary artery disease (blocked heart arteries)

Heart attack

Heart failure

Severe heart rhythm problems (arrhythmias)

Family history of heart disease

High blood pressure

Smoking

Obesity

Diabetes

Drug or alcohol abuse

Electrolyte imbalances (like low potassium)

In some cases, cardiac arrest can happen during intense physical activity. But it can also occur at rest or during sleep. Therefore, it is important to manage risk factors.

Diagnosis of Cardiac Arrest

Doctors diagnose cardiac arrest based on symptoms and a physical exam. If a person is unresponsive and not breathing, cardiac arrest is likely. In the hospital, doctors may use:

Electrocardiogram (ECG) to check heart rhythm

Blood tests to find heart damage or imbalances

Imaging tests like echocardiogram or chest X-ray

However, outside the hospital, quick action is more important than tests. If you see someone collapse and stop breathing, call emergency services right away.

Treatment Options

Treating cardiac arrest needs fast action. The main goal is to restart the heart and restore breathing. Common cardiac arrest treatment steps include:

Call emergency services immediately

Start CPR (chest compressions and rescue breaths)

Use an automated external defibrillator (AED) if available

Continue CPR until help arrives

In the hospital, doctors may use medicines, advanced airway support, or special procedures. Sometimes, they may place a device called an implantable cardioverter-defibrillator (ICD) to prevent future episodes. Early treatment improves survival rates.

Prevention Tips

There are ways to lower your risk of cardiac arrest. While not all cases can be prevented, healthy habits help. Here are some tips on how to prevent cardiac arrest:

Eat a heart-healthy diet

Exercise regularly

Avoid smoking and limit alcohol

Manage blood pressure and cholesterol

Control diabetes if you have it

See your doctor for regular check-ups

Take medicines as prescribed

Learn CPR and how to use an AED

Additionally, talk to your doctor about your family history. They can help you find ways to reduce your risk.

When to Seek Emergency Help

If you see someone collapse, do not wait. Call emergency services right away. Signs of cardiac arrest include:

No response when you shake or shout at them

No breathing or only gasping

No pulse

Start CPR and use an AED if you have one. Every second counts. Quick action can save a life.

If you or someone you know experiences symptoms of cardiac arrest, seek emergency medical help immediately. Consult Dr. Surendra Gangawane, cardiologist, for personalized advice.