Ventricular fibrillation is the main cause of sudden cardiac death, requiring immediate medical intervention, in which the lower heart chambers contract in a disorganized and excessively fast way which fails to pump oxygenated throughout the body. Symptoms include unconsciousness and collapse, often preceded by symptoms of tachycardia.

Ventricular Fibrillation (V-Fib, VF)

Torsade de pointes (TdP) is a type of polymorphic ventricular tachycardia with obligatory QTc prolongation, that has the potential to devolve into ventricular fibrillation.

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Ventricular tachycardia is an arrhythmia in which the heart's lower chamber beats too quickly, improperly distributing oxygenated blood. It can lead to chest palpitations, low blood pressure, chest pain, shortness of breath, fainting, dizziness and lightheadedness, or even cardiac death via ventricular fibrillation.

Ventricular Tachycardia (V-Tach, VT)

Ambhore, A., Teo, S. G., Omar, A. R. B., & Poh, K. K. (2014). ECG series: Importance of QT interval in clinical practice. Singapore Medical Journal, 55(12), 607. https://doi.org/10.11622/smedj.2014172

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