STUDY OF DIFFERENT MECHANISMS OF SUPRAVENTRICULAR TACHYCARDIA BY ELECTROPHYSIOLOGICAL STUDY

Abstract

Supraventricular tachycardias are common clinical disorders that tend to attack relatiy_ )Yalthy adult population. The aim of this work is to study differentof supraventricular tachycardia in the same patient by electrophysiological study. This study included thirty consecutive patients with symptomatic documented supraventricular tachycardia who were referred for electrophysiological study and radiofrequency catheter ablation. Patients were excluded from this study if EPS proved that they had ventricular tachycardiRESULTS: RT w onj!l.J€malys-more commo • . sand atfial b;;i-H more.-eo in The association between different types of SVT was more common in females. AVRT had highest incidence within age group from 16 to 25 years while AVNRT had highest incidence within age group 46 to 60 years. The association between ,2 types or more of SVT was present in 53% of all studied patients (30 patients) AVRT 1s associated with atrial flutter/fibrillation in (27%) of all studied patients. The half of the patients of AVRT show association with atrial flutter/fibrillation (50%). 10%) of all studied patient (30 patients) showed association between AVNRT and atrial flutter/fibrillation. (33%) of patients with AVNRT showed association with atrial flutter/fibrillation.AVRT associated with AVNRT and atrial flutter/fibrillation m only (7%) of all patients.CONCLUSJON: Supraventricular tachycardia observed to be of different electrophysiologic mechanisms. There is an association between different mechanisms of SVT in the same patient. The commonest association between different mechanisms of SVT is between AVRT and atrial flutter/fibrillation followed by the associ tion between AVNRT and atrial flutter/fibrillation.