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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.

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Keywords

ablation accuracy achieve acquisition adjusted aorta applied arrhythmia atrial atrium automatic avoiding best black block blood cardiac central challenging chambers channel clinical coil college conduction connected contribute create creation defined depends described deviation diastole dimensions diverting division effective endpoints errors fibrillation five flutter fully future generated geometry gradients hamburg healthy heart implement individual individuals inferior input integrated intensity interaction investigate investigated isthmus king kingdom lesions local manually measured medications model moving near optimal partial pathways patient patients peak perforation perpendicular peter phantom planned population position positions power procedure process profile proposed reach read recurrence refocusing representative resolution restrict revealed safety scanner sciences segmentation selected selection shot since slice spatial spin starting steps studies success suite suppressed surface systems tomographic treatment triggered turbo unknown unwanted user validated validation valve varied volume volunteers wall whole window zoom