At Inventional Cardiac Consultants patient education is very important to us. It allows our health professionals and others impart information to our patients and their caregivers that will alter their health behaviors or improve their health status.

Sick Sinus Syndrome

Atrial or Supraventricular tachycardia (SVT) is a fast heart rate that starts in the upper chambers of the heart.

Some forms are called paroxysmal atrial tachycardia (PAT) or paroxysmal supraventricular tachycardia (PSVT).

How is happens


Electrical signals in the heart's upper chambers fire abnormally, which interferes with electrical signals coming from the sinoatrial (SA) node --- the heart's natural pacemaker. A series of early beats in the atria speeds up the heart rate. The rapid heartbeat does not allow enough time for the heart to fill before it contracts so blood flow to the rest of the body is compromised.

Who is likely to have AVT or SVT?
  • SVT is the most common type of arrhythmia in children
  • More common in women, but may occur in either sex
  • Anxious young people
  • People who are physically fatiqued
  • People who drink large amounts of coffee (or caffeinated substances)
  • People who drink alcohol heavily
  • People who smoke heavily

Symptoms and Complications of Atrial or SVT

Some people have no symptoms; others may feel:

  • Fainting (syncope)
  • Lightheadedness or dizziness
  • Rapid heartbeat or "palpitations" or fluttering feeling in chest or bounding pulse
  • Angina (chest pain), pressure or tightnessli>
  • Shortness of breath (dyspnea)
  • Fatigue/tiredness
In extreme cases, atrial or SVT may cause:
  • Unconsciousness
  • Cardiac Arrest

Many people don't need medical therapy. Treatment is considered if episodes are prolonged or occur often. Your doctor may recommend or try:

  • Carotid sinus massage: gentle pressure on the neck, where the carotid artery splits into two branches. Must be performed by a healthcare professional to minimize risk of stroke, heart or lung injury from blood clots.
  • Pressing gently on the eyeballs with eyes closed. But this maneuver should be guided by your doctor.
  • Valsalva maneuver: holding your nostrils closed while blowing air through your nose.
  • Dive reflex: the body's response to sudden immersion in water, especially cold water.
  • Sedation
  • Cutting down on coffee or other caffeinated substances.
  • Cutting down on alcohol
  • Quitting tobacco use
  • Getting more rest
  • In patients with Wolfe-Parkinson-White Syndrome, medications or ablation may be needed to control PSVT.