Key result
Ultra-high-frequency ECG mapping demonstrated that His-bundle pacing reduced ventricular electrical dyssynchrony by 77% and local depolarization duration by 36%.
Why the study?
A new ultra-high-frequency 14-lead ECG technique was introduced to map ventricular depolarization patterns and calculate novel dyssynchrony parameters to improve patient selection and application of CRT.
Does ultra-high-frequency ECG mapping accurately describe ventricular depolarization patterns and dyssynchrony before and during cardiac resynchronization therapy in patients with bundle branch block?
Observational (n=11)
Does ultra-high-frequency ECG mapping accurately describe ventricular depolarization patterns and dyssynchrony before and during cardiac resynchronization therapy in patients with bundle branch block?
UHF-ECG provides novel, sensitive parameters of electrical dyssynchrony that may better guide and optimize cardiac resynchronization therapy compared to standard QRS duration.
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Hypothesis-generating in a single case; leaves open UHF-ECG role in guiding His-bundle pacing before prospective validation.
Jurák et al. (2019) conducted an observational in Bundle branch block undergoing cardiac resynchronization therapy (n=11). Ultra-high-frequency 14-lead electrocardiogram (UHF-ECG) vs. Baseline (before CRT) was evaluated on Ventricular electrical dyssynchrony (e-DYS) and duration of local depolarization (Vd). Ultra-high-frequency ECG mapping demonstrated that His-bundle pacing reduced ventricular electrical dyssynchrony by 77% and local depolarization duration by 36%.
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