Supraventricular Tachycardia (SVT)

What is Supraventricular Tachycardia?

Supraventricular tachycardia is a type of arrhythmia that results in a series of rapid heartbeats. The term involves heart arrhythmias that occur above the ventricles (supraventricular) and in the atria. A heart rate that is above 100 beats per minute is typically considered tachycardia, or irregular. While the condition may not be serious or life-threatening, a racing heart can be concerning and should be discussed with Dr. Beshai.

What Causes Supraventricular Tachycardia?

Supraventricular tachycardia (SVT) is often the result of an irregularity in the heart’s electrical signals. Electrical signals are what tell the heart to beat. During supraventricular tachycardia, the electrical signals in the atria fire too early, resulting in the heart beating very quickly. In many cases, there are no obvious causes of the condition, and it often begins during the early 20s or even teen years. Some factors that increase the presence of SVT include:

  • Drinking an excessive amount of caffeine or alcohol
  • Smoking
  • Stress or lack of sleep
  • Certain medications like asthma drugs or decongestants

For others, SVT is something they are born with, caused by abnormal heart pathways or an irregular electrical circuit in the heart.

What are the Symptoms of Supraventricular Tachycardia?

When supraventricular tachycardia is present, causing the heart to beat too quickly, it does not have enough time to properly refill between beats, resulting in the body not getting enough blood to it. This can result in bothersome symptoms such as:

  • Chest pain
  • Dizziness or lightheadedness
  • Weakness and fatigue
  • Shortness of breath
  • Fainting 

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How is Supraventricular Tachycardia Treated?

Prior to treatment for supraventricular tachycardia, Dr. Beshai will discuss your symptoms and may perform an ECG test to detect a fast heartbeat. Treatment may include lifestyle changes or medications to slow the heart rate. If this does not prove effective, ablation may be recommended. Ablation involves destroying the abnormal tissue responsible for causing SVT. Further monitoring may be needed to ensure treatment is working properly.

Scheduling Your Supraventricular Tachycardia Treatment Appointment

Dr. Beshai offers supraventricular tachycardia diagnosis and treatment to regulate the heart’s electrical signals. If you experience symptoms of a fast heartbeat, contact our office and schedule your appointment at the Heart Rhythm Institute of Arizona.

The Heart Institute of Arizona has a wide array of services that come with our premium care. From in-office dianostics and treatable conditions, to hospital based procedures, we’ve got your heart covered.




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Dr. Beshai is a board-certified electrophysiologist internationally renowned and respected for his expertise and research. Having published in major medical journals and travelled all over the world to present research, he is dedicated to providing innovative, state-of-the-art care to his patients.