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Case Report: Pulmonary Vein Stenosis Following RF Ablation of Paroxysmal Atrial Fibrillation: Successful Treatment with Balloon Dilation

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Abstract

Paroxysmal atrial fibrillation and atrial tachycardia may originate from a focal source in one or multiple pulmonary veins. A focal origin facilitates a potential cure amendable to radiofrequency ablation. Herein we report the case of a 16 year old adolescent male with a tachycardia induced cardiomyopathy who presented with very frequent paroxysmal episodes of atrial fibrillation, atrial flutter and atrial tachycardia. The origin of the arrhythmia was mapped to the secondary branches of the left lower pulmonary vein using an octapolar micro-mapping catheter. Immediately following application of three radiofrequency lesions, angiography of the left lower pulmonary vein revealed a region of focal stenosis at the site of energy application, with delayed pulmonary venous emptying. Attempts to relieve any element of spasm using direct administration of nitroglycerin were unsuccessful. Three months later repeat catheterization revealed an unchanged region of tight anatomical stenosis. Balloon dilation of two stenotic areas resulted in dramatic relief of the obstruction and improved venous drainage. Recatheterization 6 months later revealed mild restenosis that was successfully redilated. Intracardiac ultrasound demonstrated focal constriction. Care should be exercised in attempting RF ablation in distal arborization sites of the pulmonary veins in children, because of the small caliber compared to adult subjects. Radiofrequency induced focal areas of stenosis may be amenable to balloon catheter dilation.

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Authors and Affiliations

  1. Department of Cardiology, Children's National Medical Center, Washington, DC

    Jeffrey P. Moak, Therese M. Giglia, Craig A. Sable, Norman C. Furbush & Richard R. Ringel

  2. Department of Cardiology, George Washington University School of Medicine, Washington, DC

    Hans J. Moore & Sung W. Lee

Authors
  1. Jeffrey P. Moak
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  2. Hans J. Moore
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  3. Sung W. Lee
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  4. Therese M. Giglia
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  5. Craig A. Sable
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  6. Norman C. Furbush
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  7. Richard R. Ringel
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Moak, J.P., Moore, H.J., Lee, S.W. et al. Case Report: Pulmonary Vein Stenosis Following RF Ablation of Paroxysmal Atrial Fibrillation: Successful Treatment with Balloon Dilation. J Interv Card Electrophysiol 4, 621–631 (2000). https://doi.org/10.1023/A:1026573816874

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  • DOI: https://doi.org/10.1023/A:1026573816874

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