MRI-guided ablation of wide complex tachycardia in a univentricular heart

Figure 1 Wide complex tachycardia. A: Electrocardiographic findings in the emergency room; B: Long-axis late gadolinium enhancement view, main chamber and one outflow tract; C: Magnetic resonance (MR) angiography, arterial phase [maximum intensity projection (MIP)]; D: MR-angiography, venous phase (MIP).

Figure 2 Tachycardia origin and post-ablation scan. A: Carto3. Yellow: His Bundle; red: area of earliest activation; red dots marked by white arrows: ablation sites; B: Short axis ate gadolinium enhancement (LGE) prior to ablation with no areas indicating scars. Note area of the septal patch (white arrow); C: Short axis LGE post-ablation: the ablation lesion is close to the area of the septal patch (white arrow).