Surface unipolar electrogram characteristics to predict site of origin of outflow tract arrhythmias using noninvasive mapping

2021 ◽  
Author(s):  
Kristie M. Coleman ◽  
Moussa Saleh ◽  
Parth Makker ◽  
Aditi S. Vaishnav ◽  
Gourg Atteya ◽  
...  
Keyword(s):  
Outflow Tract ◽  
Noninvasive Mapping ◽  
Outflow Tract Arrhythmias ◽  
Unipolar Electrogram

scholarly journals Prevalence and characteristics of idiopathic right ventricular outflow tract arrhythmias associated with J-waves

EP Europace ◽  
2011 ◽  
Vol 13 (12) ◽  
pp. 1774-1780 ◽  
Author(s):  
Y. Yamashina ◽  
T. Yagi ◽  
A. Namekawa ◽  
A. Ishida ◽  
H. Sato ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Outflow Tract Arrhythmias

Reversed polarity of bipolar electrograms for predicting a successful ablation site in focal idiopathic right ventricular outflow tract arrhythmias

Heart Rhythm ◽  
2011 ◽  
Vol 8 (5) ◽  
pp. 665-671 ◽  
Author(s):  
Carine F.B. van Huls van Taxis ◽  
Adrianus P. Wijnmaalen ◽  
Dennis W. den Uijl ◽  
Marcin Gawrysiak ◽  
Hein Putter ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Successful Ablation ◽  
Reversed Polarity ◽  
Outflow Tract Arrhythmias

scholarly journals PREVALENCE AND CHARACTERISTICS OF IDIOPATHIC RIGHT VENTRICULAR OUTFLOW TRACT ARRHYTHMIAS ASSOCIATED WITH J WAVES

2011 ◽  
Vol 57 (14) ◽  
pp. E74
Author(s):  
Yoshihiro Yamashina ◽  
Tetsuo Yagi ◽  
Akio Namekawa ◽  
Akihiko Ishida ◽  
Hirokazu Sato ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Outflow Tract Arrhythmias

scholarly journals Role of the notched unipolar electrogram in guiding catheter ablation of frequent premature ventricular contractions originating from the ventricular outflow tract

2020 ◽  
Vol 48 (12) ◽  
pp. 030006052097763
Author(s):  
Li-Hong Huang ◽  
Ming-Yang Gao ◽  
Li-Jun Zeng ◽  
Bo-Qia Xie ◽  
Liang Shi ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Distribution Area ◽  
Premature Ventricular Contractions ◽  
Successful Ablation ◽  
Ablation Success ◽  
Pace Mapping ◽  
Unipolar Electrogram

Objective To investigate the value of a notched unipolar electrogram (N-uniEGM) in confirming the origin of premature ventricular contractions originating from the ventricular outflow tract (VOT-PVC) during mapping and ablation procedures. Methods This retrospective study enrolled consecutive patients with symptomatic idiopathic frequent VOT-PVCs that underwent radiofrequency ablation. The characteristics of the uniEGM of the successful ablation targets were analysed. N-uniEGM was defined as the uniEGM presenting a QS morphology with ≥1 steep notches on the downstroke deflection. All patients were followed-up for 3 months post-ablation. Results The study enrolled 190 patients with a mean ± SD age of 49.0 ± 15.3 years. N-uniEGMs were recorded in 124 of 190 (65.3%) patients. The N-uniEGM distribution area was limited to a mean ± SD of 0.8 ± 0.4 cm2. N-uniEGM showed consistency with the outcomes of activation mapping and pace mapping. Patients with an N-uniEGM had an ablation success rate of 98.4% (122 of 124) and their ablation times were significantly shorter than those without an N-uniEGM (7.6 ± 3.8 s versus 15.8 ± 8.8 s, respectively). The sensitivity and specificity of N-uniEGM in predicting successful ablation of VOT-PVCs were 72.6% and 91.7%, respectively. Conclusion N-uniEGM was a highly specific and moderately sensitive predictor of successful radiofrequency ablation in patients with VOT-PVCs.

scholarly journals Idiopathic Ventricular Outflow Tract Arrhythmias: Avoid the Use of a Sledgehammer to Crack a Nut

2021 ◽  
Author(s):  
Roy John ◽  
Alexander Perino
Keyword(s):  
Large Volume ◽  
Ventricular Arrhythmias ◽  
Ventricular Outflow Tract ◽  
Outflow Tract ◽  
Common Site ◽  
Outflow Tract Arrhythmias ◽  
Definition Of

Ventricular outflow is a common site for idiopathic PVCs and repetitive ventricular arrhythmias. Sites of origin of these arrhythmias may vary from the sites of earliest activation mapped. Better definition of the site of origin can help avoid unnecessary large volume ablation to suppress these arrhythmia.

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