Electroanatomic visualization of reentrant circuit of left fascicular ventricular tachycardia guiding a fluoroless ablation

Left Fascicular Ventricular tachycardia (LFVT), affects young adults (15–40 years) with structurally normal hearts. In 90% of cases LFVT originates from the left posterior fascicle and has a right-bundle brunch block (RBBB) pattern with left axis deviation and in rare cases with right axis deviation. LVFT is often responsive to calcium channel blockers administration 1-3 . In some cases LFVT may be incessant and may cause a reversible tachycardia-related cardiomyopathy.