Key result
A new echocardiographic method for predicting optimal AV delay in biventricular pacing yielded significantly higher cardiac output (4.5 L/min) than short (4.3 L/min) or long (4.4 L/min) delays (P<0.01).
Why the study?
Does a fast echocardiographic method accurately determine the optimal AV delay to maximize cardiac output in patients with heart failure and biventricular pacing?
Population
18 patients with heart failure and at least minimum functional mitral regurgitation treated with atrial…
Comparison
Echocardiographic method to predict optimal AV… vs Short AV delay and long AV delay
Design
Cross-sectional
Authors
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Supports rapid AV optimization in CRT; leaves open outcome benefits versus standard methods in prospective trials.
Does a fast echocardiographic method accurately determine the optimal AV delay to maximize cardiac output in patients with heart failure and biventricular pacing?
Absolute Event Rate: 4.5% vs 4.3%
p-value: p=<0.01
A simple echocardiographic method using transmitral filling and mitral regurgitation timing can rapidly and accurately optimize AV delay to maximize cardiac output in patients with biventricular pacemakers.
Meluzı́n et al. (2004) studied Heart failure with functional mitral regurgitation (n=18). Optimal AV delay determined by echocardiography vs. Short and long AV delays was evaluated on Cardiac output (p=<0.01). A new echocardiographic method for predicting optimal AV delay in biventricular pacing yielded significantly higher cardiac output (4.5 L/min) than short (4.3 L/min) or long (4.4 L/min) delays (P<0.01).
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