Related Experiment Video
Updated: Mar 29, 2026

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
Published on: October 28, 2020
Exercise left ventricular ejection fraction predicts events in right bundle branch block
Jesús Peteiro1, Alberto Bouzas-Mosquera1, Javier Broullón2
1a Department of Cardiology , Complejo Hospitalario Universitario de A Coruña (CHUAC), Universidad de A Coruña e Instituto de Investigacion Biomedica de A Coruña (INIBIC) , A Coruña , Spain ;
Objective:
Interpretation of the electrocardiogram (ECG) during exercise is not easy in patients with right bundle branch block (RBBB). Also, the value of exercise echocardiography (ExE) for predicting outcome in them has not been addressed. We sought to assess its prognostic value in patients with RBBB and known/suspected coronary disease.
Design:
Retrospective analysis of data on 703 patients with RBBB who were submitted to a clinically-indicated ExE. The end points were overall mortality and combined myocardial infarction and cardiovascular mortality.
Results:
During follow-up (4.1 ± 4.5 years) there were 130 deaths and 108 combined events. Independent predictors of combined events were history of coronary artery disease (hazard ratio [HR] = 2.37, 95% Confidence Interval [CI] = 1.24-4.52, p = 0.009) resting wall motion score index (HR = 2.14, 95% CI = 1.12-4.10, p = 0.02), metabolic equivalents (HR = 0.89, 95% CI = 0.93-0.97, p = 0.007), Δ in double product with exercise (HR = 0.96, 95% CI = 0.92-1.00, p = 0.036) and Δ in left ventricular ejection fraction (LVEF) with exercise (HR = 0.97, 95% CI = 0.94-0.99, p = 0.01). Neither positive clinical nor ECG exercise testing was predictive. Combined event rates were 3.3% in patients with ΔLVEF > 5%, 4.7% in those with ΔLVEF between 1-5% and 8.2% in those with no increase (Δ < 1%).
Conclusions:
A decrease in LVEF during exercise is predictive of serious events in patients with RBBB.
More Related Videos
12:45Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
Published on: December 11, 2017
08:21Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice
Published on: June 15, 2020
Related Concept Videos
Mitral Regurgitation I: Introduction
Mitral Stenosis I: Introduction
Aortic Regurgitation II: Clinical Features and Diagnostic Tests
Mitral Stenosis II: Clinical features and Diagnostic Tests