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Abstract #0470

Atrial Wall Thickness Imaging for Cavotricuspid Isthmus Ablation

Tobias Voigt1, Peter Koken2, James Harrison3, Steffen Weiss2, Sascha Krueger2, Tobias Schaeffter3

1Clinical Research Europe, Philips Research, London, United Kingdom; 2Tomographic Imaging Systems, Philips Research, Hamburg, Germany; 3Division of Imaging Sciences, King's College London, London, United Kingdom

In this work a fully integrated MR Wall Thickness Imagin (WTI) procedure for cavotricuspid isthmus (CTI) ablation is described. The treatment of cardiac arrhythmias by RF ablation has grown rapidly in recent years. The main goal of atrial ablation procedures is to block unwanted conduction pathways by creating transmural lesions. A major challenge is given by the unknown atrial wall thickness. MR atrial wall thickness imaging (WTI) may provide this information and contribute to increase in ablation success rates. The proposed technique is validated in a phantom study and applied in healthy volunteers and an atrial flutter patient.