Key result
Using P-wave onset as the starting point for left atrial strain analysis correlated better with 3D echocardiographic LA total emptying fraction than using R-wave peak (r=0.458 vs 0.308, P=0.026).
Why the study?
Does using P-wave onset compared to R-wave peak as the starting point for left atrial strain analysis improve correlation with 3D echocardiographic volume indices?
Population
78 subjects with and without various cardiac diseases, mean age 61 ± 17 years, 25 males
Comparison
Left atrial strain analysis using P-wave onset… vs Left atrial strain analysis using R-wave peak as…
Design
Cross-sectional
Authors
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May favor P-wave onset for LA strain in clinical echocardiography; leaves open prospective validation and standardization.
Cross-Sectional (n=78)
Does using P-wave onset compared to R-wave peak as the starting point for left atrial strain analysis improve correlation with 3D echocardiographic volume indices?
Effect estimate: r = 0.458 vs. 0.308
p-value: p=0.026
Using P-wave onset rather than R-wave peak as the starting point for left atrial strain analysis provides better correlation with 3D echocardiographic volume indices.
Hayashi et al. (2014) conducted a cross-sectional in Cardiac diseases (n=78). P-wave onset trigger for LA strain analysis vs. R-wave peak trigger was evaluated on Correlation between LA strain during reservoir phase and LA total emptying fraction (r = 0.458 vs. 0.308, p=0.026). Using P-wave onset as the starting point for left atrial strain analysis correlated better with 3D echocardiographic LA total emptying fraction than using R-wave peak (r=0.458 vs 0.308, P=0.026).
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