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Ventricular Fibrillation

Ventricular fibrillation (V-fib) is a life-threatening heart rhythm disorder where the lower chambers of the heart quiver rapidly instead of pumping effectively. It requires immediate medical attention.
18/05/2026
Updated: 19/05/2026
Ventricular Fibrillation

Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for any medical concerns.

Understanding Ventricular Fibrillation

Ventricular fibrillation is one of the most dangerous types of arrhythmia (irregular heartbeat). It is not a sustainable state, and if left untreated, it can lead to sudden cardiac arrest. The goal of treatment is always to restore a normal, organized heart rhythm immediately.

Key Symptoms to Watch For

  • Sudden collapse or loss of consciousness.
  • Palpitations or a feeling of a racing, erratic heartbeat.
  • Difficulty breathing or shortness of breath.
  • Rapid, irregular, and potentially weak pulse.

Treatment and Care Options

Ventricular fibrillation is a medical emergency. Immediate treatment must occur in a healthcare setting and typically involves electric cardioversion (defibrillation) via an AED or manual defibrillator to reset the heart's electrical rhythm. Supportive care includes managing underlying conditions, such as optimizing electrolyte levels, controlling blood pressure, and using antiarrhythmic medications to prevent future episodes. Lifestyle changes, including managing weight, quitting smoking, and following a heart-healthy diet, are crucial for long-term management.

What Causes this Condition?

Ventricular fibrillation occurs when the electrical signals that tell the heart to beat are chaotic and disorganized. These disruptions prevent the heart muscle from pumping blood effectively.

  • Underlying heart disease (such as coronary artery disease or heart failure).
  • Electrolyte imbalances (such as low potassium or high calcium).
  • Stress on the heart (such as during intense exercise or emotional stress).
  • Medications or substance use that affect heart rhythm.