What question did this study set out to answer?

June 27, 2026EP EuropaceOpen Access

The efficacy of conduction system pacing and conventional strategies under bundle branch block depends on the resynchronisation metric: a computational study

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Why the study?

Assessing the degree of resynchronisation achieved by conduction system pacing versus conventional strategies using conventional clinical indices remains ambiguous.

Does conduction system pacing improve resynchronisation efficacy compared to biventricular pacing in a computational model of bundle branch block?

Population

Four-chamber model of human electrophysiology under bundle branch block conditions

Comparison

CSP modalities (LBBP and RBBP) vs conventional strategies such as BiVP

Design

High-fidelity computational simulation study

Authors

MKM KarimanMedical University of Graz CAC M AugustinMedical University of Graz GPG PlankMedical University of Graz

Discussion

Member takes

Implication

May guide BiVP optimization in focal LBBB; hypothesis-generating for CSP comparisons in CRT nonresponders.

Key Points

The aim is to compare the efficacy of conduction system pacing versus conventional strategies in terms of resynchronisation metrics.
Used high-fidelity computational simulations of a four-chamber human heart model.
Evaluated left and right bundle branch pacing alongside biventricular pacing under bundle branch block.
Assessed pacing efficacy using clinical ECG markers, high-density activation maps, and novel metrics.
BiVP improved ECG markers, narrowing QRS duration from 120 to 90 ms and reducing V6RWPT from 53 to 10 ms.
LBBP achieved better ECG outcomes and similar activation profiles to normal sinus activation, but residual dyssynchrony was noted.
The effectiveness of pacing strategies varied significantly based on the assessment metrics used.

Structured PICO

Does conduction system pacing improve resynchronisation efficacy compared to biventricular pacing in a computational model of bundle branch block?

Population

Four-chamber computational model of human electrophysiology under bundle branch block conditions

Intervention

Conduction system pacing (CSP) modalities comprising left and right bundle branch pacing (LBBP and RBBP)

Comparator

Conventional strategies such as biventricular pacing (BiVP)

Outcome

Resynchronisation efficacy assessed by clinical ECG markers (QRS duration, H-V interval, V6V1II, V6RWPT), high density activation maps, and ventricular activation velocitysurrogate

Computational modeling reveals that standard ECG markers may incompletely capture the true electrical synchrony achieved by different pacing strategies like BiVP and LBBP.

Cite This Study

Kariman et al. (2026) studied this question.

synapsesocial.com/papers/6a3f97bb125782b61d8658ff https://doi.org/10.1093/europace/euag105.817

Topics

Heart failure HFrEF treatment

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The efficacy of conduction system pacing and conventional strategies under bundle branch block depends on the resynchronisation metric: a computational study

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

The efficacy of conduction system pacing and conventional strategies under bundle branch block depends on the resynchronisation metric: a computational study

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Topics

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