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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
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Initial experience with dual-sensor rate-responsive pacemakers in children

A Celiker1, D Alehan, N K Tokel

  • 1Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey.

European Heart Journal
|August 1, 1996
PubMed
Summary

This study shows that a dual-sensor pacemaker effectively adjusts heart rate in children with pacing needs. The technology is safe and offers advantages, especially for endocardial implants.

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Area of Science:

  • Pediatric Cardiology
  • Biomedical Engineering
  • Implantable Devices

Background:

  • Single-chamber pacemakers with rate-responsive features are crucial for managing pediatric heart rhythm disorders.
  • Dual-sensor technology, integrating activity and stimulus-to-T wave information, aims to improve pacing accuracy.
  • Previous studies highlighted limitations in single-sensor systems, particularly in specific implant scenarios.

Purpose of the Study:

  • To evaluate the efficacy and safety of a novel single-chamber, rate-responsive pacemaker utilizing dual sensors (activity and stimulus-to-T wave) in pediatric patients.
  • To compare the performance of different sensor-blending modes during daily activities and exercise.
  • To assess the reliability of sensor cross-checking mechanisms.

Main Methods:

  • Fifteen children with high-grade atrioventricular block or sinus node dysfunction received the dual-sensor pacemaker.
  • Patients underwent 24-hour Holter monitoring and graded treadmill testing in three sensor-blending modes.
  • Pacemaker responses were analyzed during Holter monitoring, exercise tests, and via external pacemaker tapping for sensor cross-checking.

Main Results:

  • Holter monitoring confirmed pacing rate variations closely correlated with daily activity levels.
  • During exercise, initial pacing rate increases differed among sensor modes, but heart rate responses became similar as exercise progressed.
  • The Stimulus-T = Activity mode demonstrated effective rate modulation with rapid correction of inappropriate responses via sensor cross-checking.

Conclusions:

  • Single-chamber, dual-sensor pacemakers provide adequate and safe rate modulation in pediatric patients.
  • This dual-sensor technology may offer significant advantages over single-sensor devices, particularly in children with endocardial implants.
  • The evaluated pacemaker system demonstrates reliable performance and appropriate adaptation to physiological demands.