Causes and Risk Factors

What causes ventricular arrhythmia?

Ventricular arrhythmias results when electrical impulses generated in your heart's ventricles interfere with the electrical impulses generated by the sinoatrial (S-A) node. Studies have shown that ventricular tachycardias (VT) often occur in patients who have had damage from a heart attack, cardiac surgery, or other conditions. Some people with inherited heart defects also experience VT. Sometimes VT affects individuals with no history of a heart condition.

In cases of ventricular fibrillation (VF), patients usually lose consciousness very quickly.

If a fast ventricular rhythm is not treated it can change into VF, can lead to sudden cardiac arrest and ultimately sudden cardiac death. Sudden cardiac arrest affects 350,000 people each year in the United States (meaning that every 38 seconds, someone dies from sudden cardiac arrest).1