What Is The Difference Between Supraventricular And Ventricular Arrhythmias?

 

Heart rhythm problems are often named by where they begin.

Supraventricular arrhythmias start above the ventricles, usually in the atria or near the AV node. Ventricular arrhythmias start in the lower chambers of the heart, which are responsible for pumping blood to the lungs and the rest of the body.

This distinction is important because rhythm problems in the ventricles can affect blood circulation more directly.

Why Location Matters

In many supraventricular arrhythmias, the lower chambers still receive signals and continue pumping, even if the rhythm feels fast or irregular.

In ventricular arrhythmias, the problem begins in the heart’s main pumping chambers. If the rhythm becomes too fast or chaotic, the heart may not pump enough blood, which can lead to fainting, collapse, or cardiac arrest.

Common Triggers And Causes

• High blood pressure

• Age-related changes in the heart

• Previous heart attack or scarring

• Cardiomyopathy

• Electrolyte imbalance

• Alcohol

• Stimulants such as caffeine or nicotine

• Sleep apnoea

• Severe emotional or physical stress

Symptoms To Take Seriously

• Chest pain

• Severe breathlessness

• Fainting or near-fainting

• Sudden weakness

• Collapse

• A racing heartbeat with dizziness

Supraventricular arrhythmias are often more common, but ventricular arrhythmias are usually treated with greater urgency. The location of the rhythm problem can change both the risk and the treatment approach.

If symptoms are severe, sudden, or worsening, call 999 immediately.