Clinical Performance of a Ventricular Automatic Capture Verification Algorithm
- 15 September 2005
- journal article
- research article
- Published by Wiley in Pacing and Clinical Electrophysiology
- Vol. 28 (9), 933-937
- https://doi.org/10.1111/j.1540-8159.2005.00196.x
Abstract
This study was conducted to evaluate the clinical performance of the ventricular automatic capture feature as implemented in the Insignia I Ultra pacemaker system (Guidant) utilizing a variety of ventricular leads. Currently, the optimal programming of the pacemaker output considers both pacemaker efficiency (prolonging battery longevity) and patient safety (adequate safety margin). The ability of a pacemaker to automatically adjust the ventricular output above the pacing threshold while maintaining the appropriate safety margin has been explored since the early 1970s and is only available today in conjunction with a specific low polarization lead system. One hundred and five patients were enrolled from 17 European centers utilizing 31 different types of ventricular leads were followed through their 3-month follow-up visit. There were no restrictions on the type of ventricular leads used. The average mean difference between the commanded autothreshold test (0.652 + 0.335 V) and the manual threshold test (0.651 + 0.335 V) was 0.001 + 0.49 (P < 0.0001). The average mean difference between the ambulatory autothreshold test (0.696 + 0.322 V) and the commanded autothreshold test (0.682 + 0.315 V) was 0.002 + 0.74 (P < 0.0001). Holter recordings confirmed that there were no loss of capture incidences without a backup pulse being delivered. In addition, the mean number of backup pulses delivered in a 24-hour period was less than 0.1% of the total number of paced beats. This study provided that the automatic capture feature while using a variety of leads accurately determines the ventricular stimulation threshold and safely delivers a backup pulse when required.Keywords
This publication has 5 references indexed in Scilit:
- Clinical Experience with an Automatic Threshold Tracking Algorithm StudyPacing and Clinical Electrophysiology, 2003
- Impact of automatic adjustment of stimulation outputs on pacemaker longevity in a new dual-chamber pacing system.Journal of Interventional Cardiac Electrophysiology, 2003
- Autocapture Enhancements: Unipolar and Bipolar Lead Compatibility and Bipolar Pacing Capability on Bipolar LeadsPacing and Clinical Electrophysiology, 2003
- Reduction of pacing output coupling capacitance for sensing the evoked response.Pacing and Clinical Electrophysiology, 2001
- Pacing Threshold Trends and Variability in Modern Tined Leads Assessed Using High Resolution Automatic Measurements: Conversion of Pulse Width into Voltage ThresholdsPacing and Clinical Electrophysiology, 1999