Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

["QT" pacemaker in aggregate exchange. Do old electrodes impair functional ability?].

M Sigmund1, P Schwindke, S Recker

  • 1Medizinische Klinik I, RWTH Aachen.

Zeitschrift Fur Kardiologie
|March 1, 1991
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Bacillus coagulans Unique IS2 improves stool characteristics in healthy adults with infrequent bowel movements: a randomized, double-blind, placebo-controlled trial.

Beneficial microbes·2025
Same author

Clarifying the radiative decay of the Hoyle state with charged-particle spectroscopy.

Scientific reports·2024
Same author

[Arthroscopic Superior Capsule Reconstruction with a Long Head of the Biceps Tendon Autograft: One-Year Follow-up Results].

Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca·2024
Same author

[Posterior Tibial Slope as a Morphological Risk Factor for Anterior Cruciate Ligament Reconstruction: a Retrospective Cohort Study].

Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca·2023
Same author

Changes in the body composition of boys aged 11-18 years due to COVID-19 measures in the Czech Republic.

BMC public health·2022
Same author

The effect of antibiotic versus no treatment at dry-off on udder health and milk yield in subsequent lactation: A retrospective analysis of Austrian health recording data from dairy herds.

Journal of dairy science·2022
Same journal

[Not Available].

Zeitschrift fur Kardiologie·2016
Same journal

[Not Available].

Zeitschrift fur Kardiologie·2016
Same journal

[On pathogenesis of coronary heart disease].

Zeitschrift fur Kardiologie·2016
Same journal

An overview of the evolution of the atherosclerotic plaque: from fatty streak to plaque rupture and thrombosis.

Zeitschrift fur Kardiologie·2016
Same journal

[Not Available].

Zeitschrift fur Kardiologie·2016
Same journal

[Reconstructive surgery of the aortic root].

Zeitschrift fur Kardiologie·2016
See all related articles

QT-interval driven pacemakers offer reliable T-wave sensing for rate responsiveness. Lower output voltages (2.5V) ensure consistent detection, crucial for pacemaker replacement procedures.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Electrophysiology

Background:

  • Pacemaker replacement offers an opportunity to evaluate chronic lead performance.
  • QT-interval driven pacemakers provide rate responsiveness based on ventricular repolarization.
  • Assessing T-wave sensing is critical for the proper functioning of these pacemakers.

Purpose of the Study:

  • To evaluate the electrophysiological properties and limitations of chronic pacemaker leads.
  • To assess T-wave detectability with different pacemaker systems and output settings.
  • To determine the reliability of T-wave sensing during pacemaker replacement.

Main Methods:

  • Recorded intracardiac electrograms via chronic leads in 30 patients undergoing pacemaker replacement.

Related Experiment Videos

  • Evaluated T-wave detectability using varying pulse amplitudes (2.5V and 5.0V) and two pacemaker systems (TX 915, Rhythmyx).
  • Analyzed T-wave signal characteristics, including capacitor discharge effects and amplitude, across different devices and settings.

    • Main Results:

    • At 2.5V output, T-wave amplitude was ≥1.5 mV in all 19 patients paced at this voltage.
    • At 5V output, 9/30 patients had T-wave amplitude <1 mV, with 6/30 experiencing undetectable T-waves.
    • The Rhythmyx pacemaker demonstrated markedly better T-wave discrimination compared to the TX 915.
    • Reliable T-wave sensing was achieved at 2.5V/0.2ms in 37 patients, while 5V/2ms failed in 8/37 cases.

    Conclusions:

    • QT-interval driven pacemakers can be implanted during replacement if stimulation at <2.5V is sufficient.
    • Chronic lead performance, particularly T-wave sensing, is voltage-dependent.
    • Newer pacemaker systems like Rhythmyx show improved T-wave discrimination, enhancing reliability.