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Idiopathic left ventricular outflow tract ectopy: a single focus with extremely divergent breakouts
Sherif Gouda, Dan Wichterle1, Petr Peichl
1Department of Cardiology, Institute for Clinical and Experimental Medicine, Vídeňská 1958/9, Prague 14021, Czech Republic. dan.wichterle@ikem.cz.
BMC Cardiovascular Disorders
|November 20, 2014
Summary
Idiopathic ventricular tachycardia (VT) originates from the left ventricular outflow tract (LVOT). Ablation revealed a single focus with two distinct exit points, highlighting the importance of detailed mapping.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Arrhythmias
Background:
- Idiopathic ventricular tachycardia (VT) and premature ventricular contractions (PVCs) commonly originate from the right ventricular outflow tract.
- Less frequently, these arrhythmias arise from the left ventricular outflow tract (LVOT), either below or above the semilunar valves.
Observation:
- A case of a 24-year-old man with idiopathic VT originating from a single focus in the supravalvular LVOT is presented.
- Two divergent breakouts from this focus were observed during the ablation procedure.
Findings:
- Focal ventricular arrhythmia sources in the aortic root can exhibit multiple, distinct exit pathways.
- Meticulous activation sequence mapping is crucial for accurately identifying the arrhythmogenic origin.
Implications:
- Understanding diverse breakout patterns from LVOT foci can improve ablation success rates.
- Advanced mapping techniques are essential for managing complex idiopathic VT cases originating from the aortic root.
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