Diseases and Conditions
Atrioventricular nodal reentry tachycardia (AVNRT)
Symptoms
Causes
Risk factors
Complications
Prevention
Lifestyle and home remedies
Alternative medicine
Preparing for an appointment
Overview
Diagnosis
Treatment
Complications
Over time, untreated and frequent episodes of supraventricular tachycardia may weaken the heart and lead to heart failure, particularly if you have other coexisting medical conditions.
In extreme cases, an episode of supraventricular tachycardia may cause unconsciousness or cardiac arrest.
