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Blood Flow Through Heart  
blood flow heart

Ventricles are lower area of red.

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Definition  

The ventricles are the large lower chamber of the heart. They are responsible for moving blood to the organs and tissues of the body. In ventricular fibrillation, the heart’s ventricles contract in a rapid and chaotic manner. As a result, little or no blood is pumped from the heart. Unless medical help is provided immediately, ventricular fibrillation will lead to cardiovascular collapse and sudden death.

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Causes  

Causes of ventricular fibrillation include:

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Risk Factors  

Ventricular fibrillation is most commonly associated with CAD. Factors that can increase risk of CAD will also increase the risk of ventricular fibrillation.

The following factors increase your chance of developing ventricular fibrillation. If you have any of these risk factors, tell your doctor:

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Symptoms  

Ventricular fibrillation happens without warning. When it occurs, symptoms may include:

  • Loss of consciousness within seconds
  • Sudden collapse
  • Seizures
  • Loss of color in the skin
  • Dilated pupils
  • No detectable pulse, heartbeat, or blood pressure
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Diagnosis  

Ventricular fibrillation is suspected when a person collapses suddenly and has no detectable pulse or heartbeat. The diagnosis is confirmed by electrocardiography (ECG) . ECG records the heart’s activity by measuring electrical currents through the heart muscle.

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Treatment  

Ventricular fibrillation must be treated as an extreme emergency and treatment must be administered within 4-6 minutes.

Cardiopulmonary Resuscitation (CPR)  

CPR , which begins with giving chest compressions, is a temporary procedure that can help maintain some blood flow to the brain, heart, and other vital organs until trained medical personnel are available to provide more advanced treatment.

Defibrillation  

In defibrillation, an electronic device is used to give an electric shock to the heart. The electric shock helps to re-establish the normal contraction rhythms of the heart. An automated external defibrillator (AED) is a portable defibrillation device. Most ambulances carry AEDs. They are also frequently found in many public places, such as sports complexes.

Defibrillation should be done as soon as equipment is available.

Anti-arrhythmic Drugs  

Anti-arrhythmic drugs, such as amiodarone , lidocaine , and procainamide , may be given intravenously with continued resuscitation attempts when a person continues to fibrillate.

If the heart’s rhythm is stabilized by defibrillation, anti-arrhythmic drugs can be given to maintain the heart’s rhythm.

Implanted Cardioverter Defibrillator  
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Implantable Cardioverter Defibrillator  

An implantable cardioverter defibrillator (ICD) can be surgically placed in the chest to help prevent ventricular fibrillation. An ICD continuously monitors the heart’s rhythm. If it detects an abnormal beat, it automatically sends electrical impulses to restore the heart’s normal rhythm.

If you are diagnosed with ventricular fibrillation, follow your doctor's instructions .

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Prevention  

To help reduce your chance of getting ventricular fibrillation, take the following steps:

  • Lower your risk of CAD:
    • Eat a