PMID: 9170137May 1, 1997Paper

Toward optimizing a preshaped catheter and system parameters to achieve single lead DDD pacing

Pacing and Clinical Electrophysiology : PACE
R R BrownleeP Neff

Abstract

P wave electrogram amplitudes and atrial stimulation thresholds were determined in eight Hanford miniature swine using a preshaped catheter with an "S" curve in the SVC, and a major lobe in the atrium to enhance electrode contact with the atrial wall. The catheter was designed for pacing and sensing in the DDD mode. P wave amplitudes were also ascertained with two commercially available VDD leads and compared to the data from the experimental catheters. The preshaped catheter used two 6-mm2 platinum iridium atrial electrodes with a 7-mm separation. Both atrial electrodes are on the same side of the catheter, facing outward on the major atrial lobe formed in the catheter. The P wave amplitudes were tested only in the differential bipolar configuration. For the eight preshaped catheters, the mean was 6.6 +/- 3.8 mV while for the conventional leads it was 2.9 +/- 1.6 mV. The mean atrial stimulation thresholds ranged from 1.1 +/- 0.2 V to 2.3 +/- 1.2 V, with still lower thresholds of 0.9-1.3 V when using the parallel unipolar atrial electrode configuration, in which both parts of the bipolar atrial electrode are configured as a unipolar electrode. The data suggest that bipolar simulation may be effective if sequential reverse polar...Continue Reading

References

Jun 1, 1990·Pacing and Clinical Electrophysiology : PACE·P VarrialeM Tekriwal
Jul 1, 1990·Pacing and Clinical Electrophysiology : PACE·E Longo, V Catrini
Mar 1, 1989·Pacing and Clinical Electrophysiology : PACE·R R Brownlee

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Citations

Dec 17, 2008·The Journal of Trauma·Daniel J ValentinoRoxanne R Roberts
Jan 24, 2008·Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine·Robert J WalterRoxanne R Roberts
Feb 17, 1999·Pacing and Clinical Electrophysiology : PACE·C ButterJ Neuzner
Oct 20, 1999·Pacing and Clinical Electrophysiology : PACE·C W IsraelN Lokhoff
Nov 24, 1998·Pacing and Clinical Electrophysiology : PACE·M G BongiorniF Di Gregorio

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