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Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
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Sustained Idiopathic Outflow Tract Ventricular Tachycardia: Clinical Evidence for RVOT Predominance.
Moneeb Khalaph1, Nadica Trajkovska1, Maxim Didenko1
1Department of Electrophysiology, Heart and Diabetes Center NRW, Ruhr University Bochum, Bad Oeynhausen, Germany.
Journal of Cardiovascular Electrophysiology
|March 13, 2026
Summary
Idiopathic sustained outflow tract ventricular tachycardia (OT-VT) in patients with normal hearts originates exclusively from the right ventricular outflow tract (RVOT). This finding helps guide ablation strategies for this common arrhythmia.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Arrhythmias
Background:
- Idiopathic premature ventricular contractions (PVCs) often originate from the right ventricular outflow tract (RVOT).
- The precise anatomical origin and clinical significance of sustained outflow tract ventricular tachycardia (OT-VT) remain incompletely understood.
- Understanding the origin of OT-VT is crucial for effective ablation strategies.
Purpose of the Study:
- To characterize clinical and procedural features of patients with idiopathic sustained OT-VT.
- To determine if the origin of OT-VT can be predicted from clinical presentation.
- To investigate the prevalence of RVOT versus LVOT origin in sustained OT-VT.
Main Methods:
- Retrospective cohort study of 35 patients with sustained OT-VT undergoing ablation.
- Collection of baseline clinical and echocardiographic data.
- Identification of arrhythmia origin using electroanatomic mapping and assessment of ablation outcomes.
Main Results:
- All sustained OT-VT cases originated from the right ventricular outflow tract (RVOT), predominantly from the postero- or anteroseptal regions.
- No cases of sustained VT were observed originating from the left ventricular outflow tract (LVOT).
- Acute ablation success was 100%, with a recurrence rate of 8.6% managed successfully with repeat ablation.
Conclusions:
- Sustained OT-VT in patients with structurally normal hearts exclusively arises from the RVOT.
- This consistent origin simplifies mapping and ablation approaches for OT-VT.
- Knowledge of RVOT predominance can optimize procedural planning and improve patient outcomes.
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