Incidence and timing of activity parameter changes in activity responsive pacing systems
| Autor: | Steven P. Kutalek, Thomas S. Ahern, March Maquilan, Melinda Schuster, Charles Nydegger, Daniel J. McCormick |
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| Rok vydání: | 1992 |
| Předmět: |
Male
medicine.medical_specialty Pacemaker Artificial Heart block Insertion site Objective data Sick sinus syndrome Heart Rate Internal medicine Telemetry Heart rate medicine Humans Exercise Aged Retrospective Studies Sick Sinus Syndrome business.industry Incidence (epidemiology) Incidence Significant difference Cardiac Pacing Artificial General Medicine Equipment Design medicine.disease Heart Block Evaluation Studies as Topic Cardiology Exercise Test Female Cardiology and Cardiovascular Medicine business |
| Zdroj: | Pacing and clinical electrophysiology : PACE. 15(5) |
| ISSN: | 0147-8389 |
| Popis: | The incidence and timing of rate response parameter reprogramming in activity responsive pacing systems during the year after implantation was evaluated in two groups of patients: 24 patients in whom a VVI,R system was implanted (Activitrax, Medtronic, Inc.), and 21 patients in whom a DDD,R system was implanted (Synchrony, Siemens Pacesetter, Inc.). Activity parameter changes in Activitrax patients were made based on the presence of symptoms, while in Synchrony patients, changes were based on objective data obtained using a sensor indicated rate histogram with a slow and fast walk protocol. No significant difference in the incidence of activity parameter reprogramming was noted at various time intervals during the first year in Activitrax patients; in Synchrony patients a greater incidence of reprogramming changes was noted at the 1-month follow-up visit compared to later follow-up visits (P less than 0.02). Further, the incidence of changes at 1 month was greater for Synchrony compared to Activitrax patients (P less than 0.001), while no difference was detected between groups at subsequent follow-up intervals. Use of the slow and fast walk protocol, by permitting serial evaluation of sensor response, demonstrated alterations in sensor drive rates with similar levels of activity over the initial 4 to 6 postimplant weeks. This may result from postoperative changes at the pacemaker insertion site. Based on this experience, predischarge programming may not predict long-term rate response requirements. We recommend evaluation of sensor function using an exercise protocol performed at 4 to 6 postimplant weeks in all rate responsive pacing systems that utilize a piezoelectric crystal. |
| Databáze: | OpenAIRE |
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