Key result
An echocardiographic formula accurately predicted the optimal atrioventricular delay compared to invasive measurements of cardiac output (r=0.93, P<0.0001) and wedge pressure (r=0.95, P<0.0001).
Why the study?
Does a simple echocardiographic formula accurately predict the optimal atrioventricular delay in patients with implanted DDD pacemakers?
Population
15 patients with an implanted DDD pacemaker, mean age 70.3+/-12.3 years
Comparison
Prediction of optimal atrioventricular delay… vs Optimal AV delay determined by invasive…
Design
Cross-sectional
Authors
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May enable noninvasive AV optimization in DDD pacemakers; leaves open prospective validation of clinical outcomes.
Does a simple echocardiographic formula accurately predict the optimal atrioventricular delay in patients with implanted DDD pacemakers?
Effect estimate: r = 0.93 to 0.95
p-value: p=<0.0001
A simple echocardiographic formula based on transmitral flow can accurately predict the optimal atrioventricular delay in patients with DDD pacemakers, correlating highly with invasive hemodynamic measurements.
Ishikawa et al. (1999) studied Implanted DDD pacemaker (n=15). Echocardiographic formula for predicting optimal AV delay vs. Invasive measurement of optimal AV delay (CO and PCWP) was evaluated on Correlation between predicted and invasively measured optimal AV delay (r = 0.93 to 0.95, p=<0.0001). An echocardiographic formula accurately predicted the optimal atrioventricular delay compared to invasive measurements of cardiac output (r=0.93, P<0.0001) and wedge pressure (r=0.95, P<0.0001).
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