Unusual Permanent Form of Junctional Reciprocating Tachycardia Associated With an Accessory Pathway With...

Area of Science:

• Cardiology
• Electrophysiology
• Cardiac Arrhythmias

Background:

• Permanent junctional reciprocating tachycardia (PJRT) is a rare supraventricular tachycardia.
• Manifest Wolff-Parkinson-White syndrome (WPW) is characterized by pre-excitation of the ventricles.
• Unusual presentations of cardiac arrhythmias require detailed case studies for better understanding.

Purpose of the Study:

• To report an unusual case of permanent junctional reciprocating tachycardia in a patient with manifest Wolff-Parkinson-White syndrome.
• To describe the electrophysiological characteristics of the accessory pathway responsible for the tachycardia.
• To present the successful ablation of the accessory pathway.

Main Methods:

• Electrophysiological study to identify the accessory pathway and its conduction properties.
• Analysis of anterograde and retrograde conduction characteristics (decrementality).
• Radiofrequency catheter ablation targeting the accessory pathway in the middle cardiac vein.

Main Results:

• The electrophysiological study identified an accessory pathway causing the tachycardia.
• The pathway demonstrated fast, nondecremental anterograde conduction and slow, decremental retrograde conduction.
• Successful ablation of the accessory pathway from the middle cardiac vein was achieved.

Conclusions:

• Permanent junctional reciprocating tachycardia can occur in the setting of manifest Wolff-Parkinson-White syndrome.
• Specific electrophysiological properties of the accessory pathway can guide ablation strategies.
• Catheter ablation from the middle cardiac vein is an effective treatment for this type of tachycardia.