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KMID : 1011920130140010028
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International Journal of Arrhythmia
2013 Volume.14 No. 1 p.28 ~ p.32
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Successful Radiofrequency Catheter Ablation of Scar-related Atypical Right Atrial Tachycardia with Paroxysmal Atrial Fibrillation by Using a Three-Dimensional Mapping System
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Park Yae-Min
Choi Jong-Il
Lim Hong-Euy
Park Sang-Weon
Kim Young-Hoon
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Abstract
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Successful radiofrequency catheter ablation of scar-related atypical right atrial tachycardia with paroxysmal atrial fibrillation by using a three-dimensional mapping system.
A 61-year-old woman was admitted to our institution with frequent episodes of palpitations and dyspnea caused by paroxysmal atrial tachycardia. She had a history of paroxysmal atrial fibrillation and atrial tachycardia and had previously undergone radiofrequency catheter ablation. An extensive area encompassing the crista terminalis and high septum in the right atrium was identified as the scar zone by voltage mapping. The activation map of the right atrium revealed slow activation at the crista terminalis surrounded by a lowvoltage scar zone that spread centrifugally throughout the right atrium. Focal ablation at the site of earliest low amplitude and discrete signals at the crista terminalis immediately terminated tachycardia, which was no longer inducible thereafter. This case illustrates that 3-dimensional mapping may be helpful for identifying the mechanism of arrhythmia and unusual isthmus, and thereby facilitates successful ablation.
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KEYWORD
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atrial tachycardia, catheter ablation, 3-dimensional mapping
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