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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
9 Pt 1
|
| pubmed:dateCreated |
1997-11-6
|
| pubmed:abstractText |
Thirty-seven patients (21 male, 16 female, mean age 71 years) received identical DDD pacemakers. They also received the same bipolar ventricular passive fixation electrode, which has a microporous tip of platinum-iridium, a surface area of 5.8 mm2, and steroid elution. Eighteen months after implantation the ventricular charge threshold [microC] was measured telemetrically at 0.5, 1.0, and 2.0 V, respectively. For the 1.0 and 2.0 V amplitudes the pulse duration was increased until the charge per pulse [microC] was twice the threshold value, thus giving a 100% safety margin in terms of charge ("safety charge"). Patients who had ventricular capture at 0.5 V were permanently programmed to 1.0 V (30/37 patients), while those who did not capture at 0.5 V were set to 2.0 V (7/37 patients). In both cases, the pulse duration was programmed according to the rationale of "safety charge." During a routine follow-up period of 6 months, no complications were observed and none of the patients suffered from symptoms indicating loss of ventricular capture. Twenty-four-hour Holter recordings, obtained from all patients at the end of the follow-up with the output parameters unchanged, revealed constant ventricular capture. In patients with chronic stable pacing thresholds and steroid-eluting low threshold leads who have capture at 0.5 V, chronic ventricular pacing at an output amplitude of 1.0 V is feasible, and it seems to be safe if the pacing threshold is measured as charge delivered per pulse and a 100% safety margin in terms of charge is programmed. Reducing the output amplitude to well below the battery voltage may increase pacemaker longevity.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:status |
MEDLINE
|
| pubmed:month |
Sep
|
| pubmed:issn |
0147-8389
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
20
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
2171-8
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| pubmed:dateRevised |
2005-11-17
|
| pubmed:meshHeading |
pubmed-meshheading:9309740-Aged,
pubmed-meshheading:9309740-Cardiac Pacing, Artificial,
pubmed-meshheading:9309740-Electric Power Supplies,
pubmed-meshheading:9309740-Electrocardiography, Ambulatory,
pubmed-meshheading:9309740-Electrodes, Implanted,
pubmed-meshheading:9309740-Equipment Design,
pubmed-meshheading:9309740-Feasibility Studies,
pubmed-meshheading:9309740-Female,
pubmed-meshheading:9309740-Follow-Up Studies,
pubmed-meshheading:9309740-Heart Block,
pubmed-meshheading:9309740-Humans,
pubmed-meshheading:9309740-Male,
pubmed-meshheading:9309740-Pacemaker, Artificial,
pubmed-meshheading:9309740-Sick Sinus Syndrome,
pubmed-meshheading:9309740-Telemetry,
pubmed-meshheading:9309740-Time Factors
|
| pubmed:year |
1997
|
| pubmed:articleTitle |
Chronic ventricular pacing using an output amplitude of 1.0 volt.
|
| pubmed:affiliation |
Universitätskliniken, Innere Medizin III, Homburg/Saar, Germany.
|
| pubmed:publicationType |
Journal Article
|