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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

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 muscle...
Electrocardiogram01:29

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase of...
Electrodes: Overview01:17

Electrodes: Overview

Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin to...

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[Cardiac implantable electronic device-related surgery as a perfect example for interdisciplinary cooperation].

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[You can only understand today if you know yesterday : The history of rhythmology in Germany].

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Related Experiment Video

Updated: Jun 15, 2026

Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts
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Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts

Published on: July 18, 2025

[Stored electrograms in pacemakers and ICDs].

C W Israel

    Herzschrittmachertherapie & Elektrophysiologie
    |March 16, 2010
    PubMed
    Summary

    Stored electrograms (EGMs) are crucial for pacemaker and implantable cardioverter-defibrillator (ICD) therapy. This guide offers essential instructions for interpreting EGMs across different manufacturers to improve device function and patient outcomes.

    Area of Science:

    • Cardiac Electrophysiology
    • Medical Device Technology

    Context:

    • Stored electrograms (EGMs) are vital for analyzing pacemaker and implantable cardioverter-defibrillator (ICD) performance.
    • Accurate interpretation of EGMs is critical for diagnosing atrial tachyarrhythmias and discriminating between ventricular and supraventricular tachycardia.
    • A lack of standardized interpretation guidelines across manufacturers limits widespread clinical understanding.

    Purpose:

    • To provide systematic instructions for interpreting stored EGMs from various pacemaker and ICD systems.
    • To enhance understanding of marker annotations and electrogram registrations through clinical examples.
    • To democratize knowledge regarding the utility and practical application of stored EGMs.

    Summary:

    • This issue addresses the interpretation of stored electrograms (EGMs) in pacemakers and implantable cardioverter-defibrillators (ICDs).

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    Programmed Electrical Stimulation in Mice

    Published on: May 26, 2010

  • It focuses on challenges in detecting atrial tachyarrhythmias and discriminating between ventricular and supraventricular tachycardias.
  • The content explains marker annotations and EGM registrations using clinical case studies for different device manufacturers.

    • Impact:

    • Aims to improve the efficacy of pacemaker and ICD therapies through better EGM interpretation.
    • Facilitates broader clinical adoption and understanding of stored EGM analysis.
    • Empowers healthcare professionals with the knowledge to optimize device management and patient care.