Pseudo-r′wave Or Notching And ST-segment Elevation In The Identification Of PSVT

Objective To evaluate the Pseudo-r′ or notching and ST-segment elevation in lead aVR in paroxysal supraventricular tachycardia(PSVT).Method Electrophysiological testing and radiofequeney catheter ablation(RFCA) in 150 patients of PSVT were performed routinely, with AVRT 82 cases and AVNRT 68 cases.To observe aVR-lead terminal QRS Morphology and ST-segment elevation(horizontal, up-slope type, and down-slope type) in sinus rhythm and ventricular tachycardia episodes.Result Of 82 AVRT cases,ST segment elevation in aVR-lead have 59 cases(72.0%),AVRT diagnostic sensitivity, specificity and positive predictive values were 73.5%, 94.0%, 91.0%;Of 68 AVNRT cases, terminal portion of the QRS complex morphological change in aVR lead have 50 cases(73.5%),AVNRT diagnostic sensitivity, specificity, and positive predictive values were 72.0%, 82.4%, 83.1%;.Conclusion Compared with sinus rhythm, aVR leads Pseudo-r′ or notching and ST-segment elevation play an important role in the identification of ventricular tachycardia.