RT-192
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Mechanical “stunning” of the left atrium following catheter ablation of chronic atrial flutter
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Paul B. Spark, Jonathan M.Kalman.
Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia
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Electrophysiological evaluation and ablation
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All intracardiac catheters were positioned following the initial
transesophageal echocardiographic evaluation to avoid physical termination of atrial flutter prior to collection
of baseline echocardiographic data. Intracardiac catheters were placed in the coronary sinus, His bundle and
tricuspid annulus positions. An 8F ablation catheter was positioned in the sub-eustachian isthmus and was used
for entrainment mapping and delivery of radiofrequency energy as previously described in detail17. In all
patients radiofrequency catheter ablation was initially performed during atrial flutter. All patients were
anticoagulated with warfarin until follow-up transesophageal echocardiography at 3 weeks. An international
normalized ratio of 2.0-2.5 was considered satisfactory.
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