Alternative Names
PSVT; Supraventricular tachycardia
Definition of Paroxysmal supraventricular tachycardia (PSVT)
Paroxysmal supraventricular tachycardia (PSVT) is an occasional . “Paroxysmal” means from time to time.
Causes, incidence, and risk factors
Normally, the chambers of the heart (atria and ventricles) contract in a coordinated manner. The contractions are caused by an electrical signal that begins in an area of the heart called the sinoatrial node (also called the sinus node or SA node). The signal moves through the upper heart chambers (the atria) and tells the atria to contract.
Signs and tests
A physical examination during a PSVT episode will show a rapid heart rate.
Treatment
If you do not have symptoms, PSVT may not require treatment.
Expectations (prognosis)
PSVT is generally not life threatening, unless other heart disorders are present.
Review
Issam Mikati, MD, Associate Professor of Medicine. Feinberg School of Medicine, Northwestern University, Chicago, IL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 5/4/2010
