RT-151
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Ablation of symptomatic
ventricular ectopic beats of the right outflow tract
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Matthias Manz, Dietmar Burkhardt,
Gerhard Lauck.
Department of Cardiology, Marienhof Hospital, Koblenz, Germany
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Abstract
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In 12 consecutive symptomatic and drug refractory the
origin of the ectopic beats was identified and ablation procedure was performed. Patients
were examined by serial ECG, Holter-ECG, bicycle-ECG, echocardiography, and thoracic
X-ray. At baseline the mean number of ectopic beats was 23 823 during Holter-ECG. No other
arrhythmias were present. Patients underwent basic electrophysiologic study, mapping
process and ablation in a single procedure. Criteria for identification of the origin of
the ectopic beats included both pace mapping with 12 leads and earliest endocardial
activation. Ablation procedure with delivered temperature of 70° C was successful in
11/12 patients eliminating the focus. The mean procedure time was 79 min (± 34), mean
fluoroscopy time was 13.8 min (± 8.8) and mean number of application was 4.4 (± 2.8). No
adverse effects occurred during a follow-up period of 7 months after ablation. The mean
number of ectopic beats/24h after ablation was 317 (± 599) with p value of 0.00024. The
clinical symptoms improved in all but one patient. One patient had a recurrence after 2
months, which could be successfully treated by a second procedure.
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Key Words
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Atrial fibrillation – RF catheter ablation
of AV junction
refractory ventricular ectopic beats, right ventricular outflow tract, OA
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