A person with a ventricular arrhythmia has an abnormal heart rate or abnormal heart rhythm. A ventricular arrhythmia is caused by abnormal electrical impulses in the ventricle.

An electrical impulse stimulates the muscle fibers in the heart to contract. The impulse spreads through the heart in a very organized manner. Any abnormality or disturbance in the impulse can result in a cardiac arrhythmia.

Common symptoms of a ventricular arrhythmia include palpitations, faintness and fainting.