Multimodality Assessment of Ventricular Scar Arrhythmogenicity.

Routine cardiac MRI scan results will be sent to Johns Hopkins University where a computer-generated model of the heart will be made, which will demonstrate predicted areas critical to VT generation and maintenance. This data will be sent back to St George's, and integrated with the standard VT ablation mapping software to allow comparison of its accuracy with standard mapping techniques.

Routine VT ablation as described elsewhere in the literature. However, a brief period of extra time (\~30 minutes) will be spent analysing the areas of the heart which the MRI scan predicted as being important for generation of VT. We will study the effect of ablation of these areas (if indicated) on distant parts of the heart.