Key result
Reduction in QRS area calculated in Frank's Z lead (ΔZ Area) best predicted acute hemodynamic response to CRT (AUC = 0.813), outperforming QRS duration or amplitude measurements.
Why the study?
Does the change in vectorcardiographic QRS area during biventricular pacing predict acute hemodynamic response in CRT patients with LBBB?
Population
25 patients with left bundle branch block undergoing cardiac resynchronization therapy, evaluated across 35…
Comparison
Vectorcardiographic QRS area measurement during… vs Baseline LBBB QRS complexes
Design
Cohort
Follow-up
acute
Authors
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May support acute CRT optimization via ΔZ Area; leaves open prospective validation for long-term outcomes.
Observational (n=25)
Does the change in vectorcardiographic QRS area during biventricular pacing predict acute hemodynamic response in CRT patients with LBBB?
Effect estimate: AUC 0.813
p-value: p=< 0.05
Reduction in QRS area in the Z lead during biventricular pacing is a strong predictor of acute hemodynamic response and may serve as a noninvasive tool to guide CRT optimization.
Pooter et al. (2016) conducted an observational in Left bundle branch block (LBBB) in cardiac resynchronization therapy (CRT) patients (n=25). Reduction in QRS area (ΔZ Area) vs. QRS duration or QRS amplitudes was evaluated on Acute hemodynamic CRT response (AHR), defined as an increase of 10% in dP/dt max (AUC 0.813, p=< 0.05). Reduction in QRS area calculated in Frank's Z lead (ΔZ Area) best predicted acute hemodynamic response to CRT (AUC = 0.813), outperforming QRS duration or amplitude measurements.
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