CAO VPB 2011 PDF

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We report electrocardiographic characteristics of idiopathic VAs arising from the anterior papillary muscle APM in the LV in two patients. Ablation was performed with an irrigated ablation catheter resulted in immediate elimination of the VAs with no return 30 min later with isoproterenol. Echocardiogram confirmed that ablation catheter on the base of APM. During 6 months of follow-up, the patient remains symptom free.

Holter monitor has shown no further VAs. In four patients, the characteristic PA potentials preceded far-field ventricular potential when VPB onset, while the PA potentials buried or postponed after far-field ventricular potential.

The PA potential characterized for fine and discrete waves with average 85 ms preceeding to QRS onset. VPB originated above the PA valve were not uncommon and presented novel characteristics with a good ablation results. To investigate incidence and mechanisms of spike potential SP in premature ventricular contractions PVCs originating from outflow tract in structurally normal heart.

Fifty-four consecutive cases with symptomatic PVCs originating from ventricular outflow tract who have been performed radio frequency catheter ablation RFCA successfully were investigated.

The incidence and patterns of spike potential SP recording at the successful ablation sites were analysed. The SP was divided into four types. There are further divided into two subtypes: type IIa and type IIb. SP incidence in final successful ablation sites during PVCs is Successful ablation site located at right ventricular outflow tract in 44 patients and left ventricular outflow tract in 10 patients.

Of the 54 cases, four recurred of PVCs after first ablation procedure and three of them received ablation again. It is notable is that these three recurrence cases show either no spike potential or no reversal of spike potential during PVC in the first ablation procedure. However, all can recorded spike potentials and also these SP can reversed to the front of QRS complex wave of PVC in their successful ablation site during second ablation procedure.

Spike potential can be recorded at the origin site in the majority of outflow tract premature ventricular contractions. Outflow tract premature ventricular contraction; Radiofrequency catheter ablation; Spike potential. We retrospectively reviewed the long-term outcomes of 37 consecutive patients receiving ICD for sustained VT, in whom inducible VT had been documented by electrophysiological studies.

Fourteen patients underwent adjunctive RFCA before defibrillator implantation Group 1 , and 23 received defibrillator implantation alone Group 2.

Clinical records were searched for adverse events, including deaths, re-hospitalization, and ICD interventions. The current study demonstrated that prophylactic RFCA for inducible VT prior to defibrillator implantation did not provide improved long-term benefits compared with ICD therapy alone in patients with sustained VT.

The aim of this study was to assess the clinical significance of the ventricular fibrillation VF induced by radiofrequency RF energy delivered for idiopathic right outflow tract RVOT ventricular tachycardia VT or premature ventricular complex PVC. Among six patients, no VF or syncope episodes were documented before ablation.

No patients have prior episodes of polymorphic VT. Ventricular fibrillation initiated by the ablation at RVOT may be due to the thermal stimulation by poor tissue-electrode contact, not predicting the future malignant ventricular tachyarrhythmia.

Oxford University Press is a department of the University of Oxford. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide. Sign In or Create an Account. Sign In. Advanced Search. Search Menu. Article Navigation. Close mobile search navigation Article Navigation. Volume Article Contents The electrophysiological characteristics and catheter ablation of ventricular arrhythmias originating from the anterior papillary muscle in the left ventricle.

The electrophysiological characteristic of ventricular premature beats above the pulmonary artery valve. The incidence and mechanisms of spike potentials in origination regions of outflow tract premature ventricular contraction. The long-term clinical outcomes of radiofrequency catheter ablation for inducible ventricular tachycardia prior to implantation of cardioverter-defibrillator. Ventricular fibrillation induced by catheter ablation in patients with idiopathic right ventricular outflow tachyarrhythmias.

Select Format Select format. Permissions Icon Permissions. The electrophysiological characteristics and catheter ablation of ventricular arrhythmias originating from the anterior papillary muscle in the left ventricle Fengxiang Zhang Fengxiang Zhang.

Minglong Chen Minglong Chen. Bing Yang Bing Yang. Hongwu Chen Hongwu Chen. Weizhu Ju Weizhu Ju. Xiaofeng Hou Xiaofeng Hou. Kejiang Cao Kejiang Cao. Hailong Tao Hailong Tao. Jinying Zhang Jinying Zhang. Ling Li Ling Li. Yu-he Jia Yu-he Jia. Jian-min Chu Jian-min Chu. Li-gang Ding Li-gang Ding. Ying-jie Zhao Ying-jie Zhao. Wei Wei Wei Wei. Jing Wang Jing Wang.

Shu Zhang Shu Zhang. Hidetaka Suenaga Hidetaka Suenaga. Shigeru Saito Shigeru Saito. Lihui Zheng Lihui Zheng. Yan Yao Yan Yao. Kuijun Zhang Kuijun Zhang.

Wensheng Chen Wensheng Chen. Jinxin Li Jinxin Li. Fangzheng Wang Fangzheng Wang. Xin Chen Xin Chen. Published on behalf of the European Society of Cardiology. All rights reserved. For permissions please email: journals. Issue Section:. Download all figures. View Metrics.

Email alerts Article activity alert. Advance article alerts. New issue alert. Receive exclusive offers and updates from Oxford Academic. More on this topic New diagnostic criteria for identifying left-sided ventricular ectopy using non-contact mapping and virtual unipolar electrogram analysis.

The role of local voltage potentials in outflow tract ectopy. Electrocardiographic algorithm to identify the optimal target ablation site for idiopathic right ventricular outflow tract ventricular premature contraction.

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Atrial fibrillation drivers mapping: should I burn or should I go? Restoration of sinus rhythm by pulmonary vein isolation improves heart failure with preserved ejection fraction in atrial fibrillation patients.

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