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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
11 Pt 2
|
| pubmed:dateCreated |
1992-12-16
|
| pubmed:abstractText |
The characteristics of the sensor and rate adaptive algorithm included in a new dual chamber rate responsive pacemaker (Relay 294-03, Intermedics, Inc.) were studied by submitting the device to calibrated to-and-fro movements of specific frequencies and peak accelerations by means of a mechanical arm connected to a speed adapter. Atrial pacing rate was continuously recorded on a Holter monitor. The influences of the frequency, the magnitude, and the axis of the acceleration forces as well as the reproducibility of the rate response were evaluated. RESULTS: (1) The sensor was sensitive to frequencies ranging from 0.5 to 7 Hz with a peak sensitivity at 3 Hz; (2) the pacing rate was not affected during movements at frequencies > 6 Hz, commonly presented as nonactivity related signals (car, bus transportation, drilling....); (3) the pacing rate increased as a function of the acceleration magnitude up to 0.5 G (0.3 G for 3 Hz), then remained constant. This level of acceleration usually corresponds to high degrees of activity; (4) rate response was maximum when acceleration was directed in the anteroposterior direction; (5) reproducibility of the rate response was excellent (R2: 0.999; slope of the regression line: 0.999). CONCLUSION: Relay 294-03 is a low frequency signal sensing rate modulated pacemaker using an accelerometer sensitive to motion, mainly in the anteroposterior direction.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Nov
|
| pubmed:issn |
0147-8389
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
15
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
1867-72
|
| pubmed:dateRevised |
2004-11-17
|
| pubmed:meshHeading |
pubmed-meshheading:1279562-Acceleration,
pubmed-meshheading:1279562-Algorithms,
pubmed-meshheading:1279562-Calibration,
pubmed-meshheading:1279562-Cardiac Pacing, Artificial,
pubmed-meshheading:1279562-Electrocardiography, Ambulatory,
pubmed-meshheading:1279562-Equipment Design,
pubmed-meshheading:1279562-Heart Rate,
pubmed-meshheading:1279562-Humans,
pubmed-meshheading:1279562-Pacemaker, Artificial,
pubmed-meshheading:1279562-Reproducibility of Results,
pubmed-meshheading:1279562-Sensitivity and Specificity,
pubmed-meshheading:1279562-Signal Processing, Computer-Assisted
|
| pubmed:year |
1992
|
| pubmed:articleTitle |
In vitro evaluation of a sensor sensitive to acceleration forces included in a new rate modulated pacemaker.
|
| pubmed:affiliation |
Cardiology Department, University of Liège, Belgium.
|
| pubmed:publicationType |
Journal Article
|