Volume 22, Issue 3 pp. 346-349

Ablation of Incessant Left Atrial Tachycardia Without Fluoroscopy in a Pregnant Woman

JOHN D. FERGUSON M.D.

JOHN D. FERGUSON M.D.

University of Virginia, Charlottesville, Virginia, USA

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ADAM HELMS M.D.

ADAM HELMS M.D.

University of Virginia, Charlottesville, Virginia, USA

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J. MICHAEL MANGRUM M.D.

J. MICHAEL MANGRUM M.D.

University of Virginia, Charlottesville, Virginia, USA

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JOHN P. DiMARCO M.D., Ph.D.

JOHN P. DiMARCO M.D., Ph.D.

University of Virginia, Charlottesville, Virginia, USA

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First published: 08 March 2011
Citations: 44
Address for correspondence: John D. Ferguson, Cardiovascular Medicine, Department of Internal Medicine, Lee Street, University of Virginia, P.O. Box 800158, Charlottesville, VA 22908, USA. Fax: 434-924-2581; E-mail: [email protected]

Dr. Ferguson reports participation on a research grant from St. Jude Medical and compensation for participation on a speaker's bureau relevant to this topic from St. Jude Medical and Boston Scientific. Dr. Mangrum reports participation on research grants from St. Jude Medical and Boston Scientific and serving as consultant to or on the advisory board of St. Jude Medical. Other authors: No disclosures.

Abstract

Ablation Without Fluoroscopy in Pregnancy. Background: Management of symptomatic atrial arrhythmia in pregnancy remains a challenge. In this case report, a pregnant woman with incessant tachycardia underwent successful left atrial ablation. The entire procedure was performed without fluoroscopy.

Methods and Results: A 20-year-old woman, 27 weeks pregnant, was admitted with congestive cardiac failure and incessant atrial tachycardia. She had an elevated brain natriuretic peptide (BNP) and chest X-ray demonstrating heart failure. The 12-lead electrocardiogram (ECG) showed atrial tachycardia with a cycle length of 310 ms, inverted P waves in lead I and the inferior leads, and a ventricular rate of 84 bpm during 2:1 block. Echocardiogram showed a global reduction in left ventricular function with a left ventricular ejection fraction (LVEF) of 0.40. Electrical cardioversion failed. Rate control could not be achieved with beta-blockers and calcium antagonists. Amiodarone with repeat cardioversion was also unsuccessful. The patient then underwent catheter ablation. The entire procedure was performed using intracardiac echocardiography (ICE) and electroanatomical mapping with no fluoroscopy. Electrophysiology (EP) study and an activation map of the left atrium confirmed a focal left atrial tachycardia which was successfully ablated. Six weeks postablation, the left ventricular function had normalized and the patient delivered a healthy child at term, without complication.

Conclusion: Ablation of left atrial tachycardia using ICE and electroanatomical guidance is feasible in pregnant women. (J Cardiovasc Electrophysiol, Vol. 22, pp. 346-349, March 2011)