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Updated: Aug 3, 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
Frequency of left ventricular dyssynchrony in patients with heart failure and a narrow QRS complex
Gabe B Bleeker1, Martin J Schalij, Sander G Molhoek
1Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands.
Abstract:
Cardiac resynchronization therapy (CRT) is considered a major advance in the treatment of patients with heart failure. The presence of left ventricular (LV) dyssynchrony seems mandatory for a positive response to CRT. Currently, only patients with wide QRS complexes are considered for CRT, although patients with narrow QRS complexes may also have LV dyssynchrony. In the present study, the incidence of LV dyssynchrony was prospectively evaluated in 64 patients with heart failure and narrow QRS complexes using tissue Doppler imaging.
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