We will use a 3D computer mapping system to create highly detailed electrical maps of the Ventricles to locate the VT circuits.

Images one to three show examples of voltage map from a patient with VT. Areas in purple represent normal heart muscle with normal voltage. Areas in blue, green and red indicate progressively lower voltage indicate of scar. This is where the VT circuits can be found.

Image four shows the same scar on an MRI. We will sometimes use a MRI to help us locate and define the scar prior to a VT ablation.

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