The evaluation of paroxysmal supraventricular tachycardia diagnosed by esophageal electrophysiology

Objectives To investigate the accuracy of diagnosis and classification of paroxysmal supraventricular tachycardia (PSVT) by esophageal electrophysiology study. Methods 42 patients with PSVT underwent both esophageal electrophysiology and intracardiac electrophysiology study on separate day,and diagnosis and classification of PSVT by these two electrophysiology study were compared. Results Diagnosis of dual atrioventricular nodal pathway (DAVNP) and slow-fast atrioventricular nodal reentrant tachycardia (AVNRT) as well as orthodromic atrioventricular reentrant tachycardia (AVRT) were not significantly different between these two electrophysiology study; Location of accessory pathway (AP) was also similar between these two electrophysiology study; but esophageal electrophysiology study couldn't differentiate fast-slow AVNRT, slow AP mediated AVRT and atrial tachycardia compared with intracardiac electrophysiology study. Conclusions Compared with intracardiac electrophysiology study, esophageal electrophysiology study has a similar accuracy of diagnosis and classification of common SVT,and have advantages of noninvasiveness, simplicity and convenience and low cost, but esophageal electrophysiology study couldn' t differentiate uncommon PSVT.