Document Detail

Long-term follow-up of patients with P-R prolongation after catheter ablation of slow pathway for atrioventricular node re-entrant tachycardia.
MedLine Citation:
PMID:  15610916     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Long-term impact of interval between P wave and R wave (P-R) prolongation on prognosis of patients with successful catheter ablation of slow atrioventricular nodal pathway was investigated. METHODS: Among 436 patients undergoing slow-pathway ablation for atrioventricular node re-entrant tachycardia (AVNRT), 17 (3.9%) experienced permanent P-R prolongation. Ablation target sites where conduction block was induced were located in mid- or anteroseptum. Fast junctional rhythm with ventriculoatrial conduction block was observed in eight patients immediately before atrioventricular block. RESULTS: Antegrade slow-pathway conduction was eliminated in 16 patients, and retrograde fast- and slow-pathway conduction was abolished in all patients. There was no recurrence of AVNRT after an average of 38 +/- 12 month follow-up. There was no deterioration of atrioventricular block in these patients. Average PR interval prior to hospital discharge and at the end of follow-up was 0.24 +/- 0.02 sec and 0.23 +/- 0.02 sec, respectively (p >0.05). Left ventricular ejection fraction remained unchanged in these patients (p >0.05). CONCLUSIONS: Radiofrequency catheter ablation of slow pathway for AVNRT is associated with a small risk of atrioventricular block. PR prolongation after successful slow-pathway ablation is associated with benign prognosis.
Lexin Wang; Jingtian Li; Rongguo Yao; Shukai Song; Zhanli Guo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Archives of medical research     Volume:  35     ISSN:  0188-4409     ISO Abbreviation:  Arch. Med. Res.     Publication Date:    2004 Sep-Oct
Date Detail:
Created Date:  2004-12-21     Completed Date:  2005-09-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9312706     Medline TA:  Arch Med Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  442-5     Citation Subset:  IM    
Department of Cardiology, The Affiliated Hospital of Weifang Medical College, Weifang City, Shandong Province, People's Republic of China.
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MeSH Terms
Catheter Ablation* / adverse effects
Follow-Up Studies
Heart Block / etiology*
Heart Conduction System / physiology
Middle Aged
Tachycardia, Atrioventricular Nodal Reentry / therapy*

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