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Updated: Jul 20, 2026

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
Cardiac resynchronization therapy for chronic heart failure: why does it not always work?
Insights
Coronary angiography can identify patients likely to benefit from cardiac resynchronization therapy (CRT). This technique assesses venous anatomy, myocardial viability, and microcirculation perfusion for successful CRT outcomes.
Area of Science:
- Cardiology
- Medical Imaging
- Heart Failure Management
Background:
- Coronary angiography and ventriculography are routinely performed in patients with left ventricular (LV) dysfunction and heart failure symptoms.
- These imaging modalities present an opportunity to evaluate their utility in predicting response to cardiac resynchronization therapy (CRT).
Discussion:
- Assessing immediate post-CRT status using angiography can identify potential responders.
- Critical factors for long-term CRT success include suitable venous anatomy for LV lead placement, viable myocardium in the septum and LV free wall, and adequate microcirculation perfusion.
Key Insights:
- Coronary angiography and ventriculography can be leveraged to predict CRT response.
- Successful CRT outcomes depend on specific anatomical and physiological factors evaluated during these procedures.
Outlook:
- Further research can refine the use of angiography in patient selection for CRT.
- Optimizing device programming and medical therapy alongside anatomical assessment may improve CRT efficacy.
Abstract:
Since coronary angiography and ventriculography are performed in all of these patients with LV dysfunction and symptoms of heart failure, it seems silly to waste the opportunity to study this technique and its value in identifying patients who will respond to CRT, at least in the immediate post-CRT state. The critical factors that may result in a successful long-term positive result of CRT in patients with optimal device programming and optimized medical therapy for heart failure are these: (1) Venous anatomy suitable for electrical stimulation of the LV free wall. (2) Viable myocardium in the septum and the LV free wall. (3) Adequate perfusion of the microcirculation in the distribution where the leads are being placed.
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