Cardiac arrest is a heart condition where the heart ceases to beat. It’s also known as sudden cardiac death.

 

Your heartbeat is controlled by electrical impulses. When these impulses change the pattern, the heartbeat becomes irregular. This is also known as an arrhythmia. Some arrhythmias are slow, others are rapid. Cardiac arrest occurs when the rhythm of the heart stops.

Cardiac arrest is an extremely serious health issue. The Institute of Medicine in America reports that every year, more than half a million people experience cardiac arrest in the United States. The condition can cause death or disability. It can be fatal but immediate response and treatment can save a life.

What Causes Cardiac Arrest?

A number of factors can cause sudden cardiac arrest. Two of the most common are ventricular and atrial fibrillation.

Ventricular Fibrillation

The heart has four chambers. The two lower chambers are the ventricles. In ventricular fibrillation, these chambers quiver out of control. This causes the heart’s rhythm to change dramatically. The ventricles begin to pump inefficiently, which severely decreases the amount of blood pumped through the body. In some cases, the circulation of blood stops completely. This may lead to sudden cardiac death. The most frequent cause of cardiac arrest is ventricular fibrillation.

Atrial Fibrillation

Atrial fibrillation begins when the sinoatrial (SA) node doesn’t send out the correct electrical impulses. Your SA node is located in the right atrium. It regulates how quickly the heart pumps blood. When the electrical impulse goes into atrial fibrillation, the ventricles can’t pump blood out to the body efficiently.

Who Is at Risk for Cardiac Arrest?

Certain heart conditions and health factors can increase your risk of cardiac arrest.

Coronary Heart Disease

This type of heart disease begins in the coronary arteries. These arteries supply the heart muscle itself. When they become blocked, the heart does not receive blood. It may stop working properly.

Large Heart

Having an abnormally large heart places you at increased risk for cardiac arrest. A large heart may not beat correctly. The muscle may also be more prone to damage.

Irregular Heart Valves

Valve disease can make heart valves leaky or narrower. This means blood circulating through the heart either overload the chambers with blood or does not fill them to capacity. The chambers may become weakened or enlarged.

Congenital Heart Disease

Some people are born with heart damage. This is known as a congenital heart problem. Sudden cardiac arrest may occur in children who were born with a serious heart problem.

Electrical Impulse Problems

Problems with your heart’s electrical system can increase your risk of sudden cardiac death. These problems are known as primary heart rhythm abnormalities.

Other risk factors for cardiac arrest include:

• Smoking
• Sedentary lifestyle
• High blood pressure
• Obesity
• Family history of heart disease
• History of a previous heart attack
• Age over 45 for men, or over 55 for women
• Substance abuse
• Low potassium or magnesium

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Signs and Symptoms of Cardiac Arrest

Early symptoms are often warning signs. Getting treatment before your heart stops could save your life.Symptoms of includes:

• Dizziness.
• Shortness of breath.
• Fatigue
• Vomiting.
• Heart palpitations.

Other symptoms are:

• Chest pain.
• No pulse.
• Difficulty breathing
• Loss of consciousness.
• Collapsing.

Cardiac arrest may not have symptoms before it occurs. If you do have symptoms that persist, seek prompt medical care immediately.

Diagnosis

During a cardiac event that causes the heart to stop beating efficiently, it’s vital to seek medical attention immediately. Medical treatment will focus on getting the blood flowing back to the body. The doctor will most likely perform a test called an electrocardiogram to identify the type of abnormal rhythm the heart is experiencing. To treat the condition, the doctor will likely use a defibrillator to shock the heart. An electric shock can often return the heart to a normal rhythm.

 

Other tests can also be used after you have experienced a cardiac event includes a blood test to look for signs of a heart attack. They can also measure potassium and magnesium levels. A Chest X-ray can also be used to look for other signs of disease in the heart.

Treating Cardiac Arrest

• Cardiopulmonary resuscitation (CPR) is one form of emergency treatment for cardiac arrest. Defibrillation is another. These treatments get the heart beating again if it has stopped.
• If you survive a cardiac arrest, your doctor may start you on one or more treatments to reduce the risk of another attack.
• Medication can lower high blood pressure and cholesterol.
• Surgery can repair damaged blood vessels or heart valves. It can also bypass or remove blockages in the arteries.
• Exercise may improve cardiovascular fitness.
• Dietary changes can help lower cholesterol levels

 

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