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Related Experiment Video

Updated: May 17, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

Resynchronization improves heart-arterial coupling reducing arterial load determinants.

Yanina Zócalo¹, Daniel Bia, Ricardo L Armentano

¹Physiology Department, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), School of Medicine, Universidad de la República, General Flores 2125, Montevideo PC: 11800, República Oriental del Uruguay. yana@fmed.edu.uy

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology

|November 13, 2012

Summary

This summary is machine-generated.

Cardiac resynchronization therapy (CRT) improves arterial biomechanics and reduces arterial load, enhancing left ventricular (LV) performance and LV-arterial coupling. These improvements are linked to aortic flow changes and occur independently of blood pressure.

Related Experiment Videos

Last Updated: May 17, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

Area of Science:

Cardiology
Biomedical Engineering
Hemodynamics

Background:

Cardiac resynchronization therapy (CRT) is known to improve left ventricular (LV) performance.
However, its mid-term effects on LV load and LV-arterial coupling remain unclear.

Purpose of the Study:

To assess the mid-term impact of CRT on LV-arterial coupling.
To evaluate changes in arterial load, its determinants, and the relationship between CRT-induced hemodynamic alterations and arterial biomechanics.

Main Methods:

Echocardiography and hemodynamic measurements were performed before and after CRT in 25 patients.
Key parameters assessed included arterial elastance (EA), aortic impedance (Zc), systemic vascular resistance (SVR), LV end-systolic elastance (EES), and LV-arterial coupling (EA/EES).

Main Results:

CRT led to a significant reduction in arterial elastance (EA) and an increase in LV end-systolic elastance (EES), improving LV-arterial coupling (EA/EES).
Arterial biomechanics improved, with a pressure-independent increase in aortic diameter and distensibility, alongside reductions in Zc and SVR.
Changes in arterial elastance determinants correlated with alterations in aortic flow.

Conclusions:

Early CRT application enhances central and peripheral arterial biomechanics.
This results in a pressure-independent increase in aortic diameter and a decrease in arterial load.
CRT improves LV systolic performance and LV-arterial coupling, with arterial biomechanical changes associated with aortic flow dynamics.