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Optimal pulse width programming for ...

Siu, Andreana Hok-Wai.

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Optimal pulse width programming for permanent ventricular pacemakers.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Optimal pulse width programming for permanent ventricular pacemakers./
Author:	Siu, Andreana Hok-Wai.
Description:	76 p.
Notes:	Source: Dissertation Abstracts International, Volume: 57-01, Section: B, page: 0245.
Contained By:	Dissertation Abstracts International57-01B.
Subject:	Health Sciences, Nursing. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9614350

Optimal pulse width programming for permanent ventricular pacemakers.
Siu, Andreana Hok-Wai.

Optimal pulse width programming for permanent ventricular pacemakers. - 76 p.

Source: Dissertation Abstracts International, Volume: 57-01, Section: B, page: 0245.

Thesis (D.N.S.)--University of California, San Francisco, 1995.

Optimal pulse width programming is important for maximizing pacemaker battery longevity. The purpose of this prospective study was to identify the optimal pulse width in patients with pacemakers. Thirty-seven patients with Pacesetter Synchrony II/III or Paragon II pacemakers were enrolled in the study. All patients had chronic pacing lead systems, implanted at least six months prior to the study. The measurements were performed during a routine pacemaker follow-up visit. Voltage thresholds were obtained at eight different pulse widths ranging from 0.2 to 1.6 msec in increments of 0.2 msec. Data on pulse current, energy, lead impedance, charge consumption and battery current drain were obtained through telemetry. Data on battery current drain was normalized to a pacing rate of 60 pulse per minute (PPM). The same set of data was also obtained with the pacemaker output programmed to a 100% voltage safety margin. Battery current drain was chosen as the parameter to determine the optimal pulse width. This data suggests that battery current drain is a function of pulse width and the status of the voltage doubler circuitry. The optimal pulse width for the majority of patients studied was 0.4 msec. For a subset of patients, a pulse width of 0.8 msec identified through threshold testing was more efficient. Recommendations for clinical practice include the following simplified approach for establishing optimal pulse width: (1) determine voltage threshold at 0.4 msec, (2) If the voltage threshold is Subjects--Topical Terms:

1017798
Health Sciences, Nursing.

Optimal pulse width programming for permanent ventricular pacemakers.
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040 $a UnM $c UnM
100 1 $a Siu, Andreana Hok-Wai. $3 1907141
245 1 0 $a Optimal pulse width programming for permanent ventricular pacemakers.
300 $a 76 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-01, Section: B, page: 0245.
500 $a Adviser: Barbara J. Drew.
502 $a Thesis (D.N.S.)--University of California, San Francisco, 1995.
520 $a Optimal pulse width programming is important for maximizing pacemaker battery longevity. The purpose of this prospective study was to identify the optimal pulse width in patients with pacemakers. Thirty-seven patients with Pacesetter Synchrony II/III or Paragon II pacemakers were enrolled in the study. All patients had chronic pacing lead systems, implanted at least six months prior to the study. The measurements were performed during a routine pacemaker follow-up visit. Voltage thresholds were obtained at eight different pulse widths ranging from 0.2 to 1.6 msec in increments of 0.2 msec. Data on pulse current, energy, lead impedance, charge consumption and battery current drain were obtained through telemetry. Data on battery current drain was normalized to a pacing rate of 60 pulse per minute (PPM). The same set of data was also obtained with the pacemaker output programmed to a 100% voltage safety margin. Battery current drain was chosen as the parameter to determine the optimal pulse width. This data suggests that battery current drain is a function of pulse width and the status of the voltage doubler circuitry. The optimal pulse width for the majority of patients studied was 0.4 msec. For a subset of patients, a pulse width of 0.8 msec identified through threshold testing was more efficient. Recommendations for clinical practice include the following simplified approach for establishing optimal pulse width: (1) determine voltage threshold at 0.4 msec, (2) If the voltage threshold is $\ le $1 volt or $\ ge $2 volts, program the output to twice the voltage threshold value at 0.4 msec, (3) If the voltage is between 1.0 and 2.0 volts, recheck the voltage threshold at 0.8 msec and (4) program the final output at twice the voltage threshold at 0.8 msec. These recommendations will help to standardize clinical practice. In addition, maximizing battery longevity will decrease the number of reoperations necessary for generator replacement and thus minimizes the risk of infection from surgery and medical cost.
590 $a School code: 0034.
650 4 $a Health Sciences, Nursing. $3 1017798
650 4 $a Engineering, Biomedical. $3 1017684
650 4 $a Health Sciences, Medicine and Surgery. $3 1017756
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710 2 0 $a University of California, San Francisco. $3 1025118
773 0 $t Dissertation Abstracts International $g 57-01B.
790 1 0 $a Drew, Barbara J., $e advisor
790 $a 0034
791 $a D.N.S.
792 $a 1995
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9614350