The objectives of this study were to compare characteristics of patients, accessory pathways and outcome of radiofrequency catheter ablation RFCA between the 2 types of accessory pathways. We reviewed the electrophysiology report of patients with supraventricular tachycardia from the accessory pathway who were referred for RFCA.
There were 74 males and 74 females at a mean age of 37 years. Request an Appointment at Mayo Clinic. Typical heartbeat Open pop-up dialog box Close. Typical heartbeat In a typical heart rhythm, a tiny cluster of cells at the sinus node sends out an electrical signal. Share on: Facebook Twitter. Show references Di Biase L, et al. Wolff-Parkinson-White syndrome: Anatomy, epidemiology, clinical manifestations, and diagnosis. Accessed Dec. Ferri FF.
Wolff-Parkinson-White syndrome. In: Ferri's Clinical Advisor Elsevier; Other heart rhythm disorders.
American Heart Association. Supraventricular tachycardia. Mayo Clinic; Genetics Home Reference. Benson DW, et al. Wolff-Parkinson-White syndrome: Lessons learnt and lessons remaining.
Cardiology in the Young. Di Biase L, et al. Treatment of symptomatic arrhythmias associated with the Wolff-Parkinson-White syndrome. Dubin AM. Clinical features and diagnosis of supraventricular tachycardia in children. After an episode it is usual to feel very tired. In the overwhelming of cases, SVT is a benign condition. This means that it will not cause sudden death, will not damage the heart or cause a heart attack, and will not shorten life span. There are some rare exceptions that your doctor will discuss with you if relevant.
Learn more about the different Heart Tests here. There are 3 main types of SVT. Instead of a single AV node connection between the top and bottom chambers, there is a second connection that is abnormal. The slow pathway is present from birth.
A single extra beat arising from anywhere in the heart may result in electrical conduction through this abnormal connection. The electrical signal then gets caught up in a short circuit around the AV node resulting in an abnormally fast heart rhythm. An accessory pathway is a small abnormal electrical connection that has been present since birth and is not directly connected to the AV node.
Most often, it occurs on the left side of the heart. A single extra beat arising from anywhere in the heart may result in electrical conduction through this extra pathway. The electrical signal then gets caught up in a short circuit involving the pathway and the AV node, resulting in an abnormally fast heart rhythm accompanied by palpitations.
The short circuit may occur in a clockwise or anticlockwise fashion. In some individuals, evidence of the accessory pathway can be seen on an ECG performed while in normal rhythm — here, the condition is called WPW syndrome. This is the least common form of SVT.
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