Document Detail

Incidence and characteristics of far-field R-wave sensing in low right atrial septum pacing.
MedLine Citation:
PMID:  22146754     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Although low atrial septal (LAS) pacing may prevent atrial tachyarrhythmias in selected patients, far-field R-wave (FFRW) sensing in this region seems more likely than in the right atrial appendage.
METHODS AND RESULTS: We compared the clinical characteristics and prevalence of FFRW sensing in 31 recipients (mean age, 74 ± 10 years) of dual-chamber pacemakers, randomly assigned to 10.0 mm (n=15) vs. 1.1mm (n=16) tip-ring electrode spacing of bipolar atrial leads implanted in the LAS for management of bradyarrhythmias. The pacemakers were programmed to DDD mode with backup rates at 50-60 beats/min. FFRW sensing was measured with atrial sensitivity set at 0.1 mV, and increased in 0.1 mV steps. Predictors of FFRW sensing were examined by multiple variable regression analysis, and hazard ratios (HR) and confidence intervals (CI) were calculated. At atrial sensitivities of 0.1 and 0.5 mV, FFRW was sensed in 24 (77%) and 9 (29%) patients, respectively. A 10.0-mm tip-ring electrode spacing of the atrial lead (HR 10.3; 95%CI 1.0-102.7; P=0.047), and presence of left ventricular hypertrophy (LVH) on 12-lead ECG (HR 14.5, 95%CI 1.2-180.0; P=0.037) were independent predictors of FFRW sensing.
CONCLUSIONS: The prevalence of FFRW sensing in the LAS region was high. A narrow spacing of the tip-ring electrodes is recommended in the LAS, particularly in the presence of LVH on ECG.
Hitoshi Minamiguchi; Haruhiko Abe; Ritsuko Kohno; Yasushi Oginosawa; Masahito Tamura; Masaaki Takeuchi; Toshihisa Nagatomo; Yutaka Otsuji
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2011-12-06
Journal Detail:
Title:  Circulation journal : official journal of the Japanese Circulation Society     Volume:  76     ISSN:  1347-4820     ISO Abbreviation:  Circ. J.     Publication Date:  2012  
Date Detail:
Created Date:  2012-02-24     Completed Date:  2012-09-11     Revised Date:  2014-07-30    
Medline Journal Info:
Nlm Unique ID:  101137683     Medline TA:  Circ J     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  598-606     Citation Subset:  IM    
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MeSH Terms
Aged, 80 and over
Atrial Septum / physiopathology*
Cardiac Pacing, Artificial / methods*
Electrodes, Implanted
Equipment Design
Middle Aged
Pacemaker, Artificial*
Tachycardia / prevention & control,  therapy
Comment In:
Circ J. 2012;76(3):582-3   [PMID:  22277321 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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