1. The Impact of the Distance between the Atrial Electrode and the Atrial Wall on Atrial Undersensing in Patients with VDD Pacemakers: Long-Term Follow-Up
- Author
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Timucin Altin, Cegerhun Polat, Basar Candemir, Çetin Erol, Aydan Ongun Ozdemir, Cansin Tulunay, Ömer Akyürek, Cagdas Ozdol, Remzi Karaoguz, and Muharrem Güldal
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medicine.medical_specialty ,business.industry ,Long term follow up ,Atrial sensing ,Potential effect ,P wave ,General Medicine ,Atrial wall ,Sinus node function ,Physiology (medical) ,Internal medicine ,Electrode ,cardiovascular system ,medicine ,Cardiology ,In patient ,cardiovascular diseases ,Cardiology and Cardiovascular Medicine ,business - Abstract
Aim: Atrial undersensing (AUS) in single-lead VDD pacemakers may be due to diminished P-wave amplitude secondary to local inflammation beneath the electrodes closer to atrial wall. The aim of this study was to assess the potential effect of distance between atrial electrode and atrial wall on immediate and long-term atrial sensing stability in VDD systems. Methods: A total of 275 patients with normal sinus node function who received VDD pacemakers were enrolled into the study and were followed up for a median duration of 33 months. During each control visit, a standard 12-lead electrocardiogram (ECG) was obtained and standard pacemaker function assessment was performed including testing for pacing threshold and atrioventricular synchrony. The distance between atrial electrode and atrial wall was measured from chest X-ray. Results: Of the 275 patients, AUS was detected in 59 patients. Univariate predictors of AUS were use of closely spaced bipolar ring atrial electrode (CSBR) (P = 0.01), wider atrial ring-spacing (P = 0.03), and atrial sensitivity programmed to a higher level (P = 0.001). Use of CSBR (P = 0.04) and atrial sensitivity ≥0.3 mV (P = 0.02) were observed to be the independent predictors for AUS. When the distance between atrial electrode and atrial wall was
- Published
- 2008
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