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Related Concept Videos

Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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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...
880

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Updated: Sep 13, 2025

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Multiple electrode leads facilitate left bundle branch area pacing: A concept evaluation study.

Ankur R Shah1, Kyoichiro Yazaki1, Benjamin Seamons1

  • 1Nora Eccles Harrison Cardiovascular Research and Training Institute, The University of Utah, Salt Lake City, Utah.

Heart Rhythm O2
|July 30, 2025
PubMed
Summary
This summary is machine-generated.

A novel multielectrode lead (MEL) demonstrated improved detection of narrow QRS durations compared to lumenless leads, suggesting it may enhance conduction system pacing strategies and streamline implantation.

Keywords:
ElectrocardiogramLeadsLeft bundle branch areaPacingPrototype

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Area of Science:

  • Cardiovascular Electrophysiology
  • Medical Device Development

Background:

  • Left bundle branch area (LBBA) lead placement traditionally uses single-electrode pacing with ECG guidance.
  • Transeptal advancement is a key step in current LBBA lead implantation.

Purpose of the Study:

  • To develop and evaluate a multielectrode lead (MEL) for improved LBBA pacing.
  • To compare MEL performance against clinically relevant lumenless leads (LLLs).

Main Methods:

  • A 3D-printed MEL with 3 circumferential electrode sites was developed.
  • MELs and LLLs were implanted in canine hearts (n=4) at up to 3 LBBA sites.
  • Impedance, pacing threshold, and QRS duration were recorded and compared.

Main Results:

  • MEL and LLL showed similar impedance and capture voltages.
  • MEL more frequently resulted in narrower QRS durations (82 ms vs 114 ms for LLL, P=.03).
  • MEL pacing evoked QRS morphology changes and durations similar to sinus rhythm.

Conclusions:

  • MELs more frequently elicited ECG markers of conduction system capture.
  • The findings suggest MELs may streamline implantation and reduce lead repositioning.
  • MELs show potential to advance conduction system pacing strategies.