Key result
Left atrial strain (LA-S) and strain rate (LA-SR) imaging significantly correlated with left atrial appendage late emptying velocity (r=0.84 and r=0.79, respectively; P<0.001).
Why the study?
Does left atrial strain and strain rate imaging correlate with left atrial appendage function in patients referred for TEE?
Observational (n=78)
Does left atrial strain and strain rate imaging correlate with left atrial appendage function in patients referred for TEE?
Effect estimate: r = 0.84
p-value: p=<0.001
Left atrial strain and strain rate imaging by transthoracic echocardiography correlates strongly with transesophageal echocardiography-derived left atrial appendage function, suggesting it is a useful noninvasive assessment method.
May support noninvasive LA strain assessment of LAA function; leaves open TEE replacement pending prospective validation.
BACKGROUND: The aim of this study was to evaluate the efficiency of left atrial strain (S) and strain rate (SR) imaging in assessing left atrial appendage (LAA) function. METHODS: We studied 78 consecutive patients (35 females and 43 males; mean age 38 ± 15 years) referred for transesophageal echocardiography (TEE). LAA late emptying velocity (LAA-EV) was calculated. Real-time color Doppler myocardial velocity imaging (MVI) data were recorded from the LAA by TEE and the lateral wall of the left atrium (LA) by transthoracic echocardiography. Longitudinal S and SR were measured in the mid portion of the lateral LA wall and lateral LAA wall during the contractile period. LAA late systolic velocity (LSV) and LA-LSV were obtained from Doppler analysis. RESULTS: A significant positive correlation was detected between LAA-EV and MVI parameters (for LAA-S, r = 0.88, p < 0.001; for LAA-SR, r = 0.84, p < 0.001; for LAA-LSV, r = 0.83, p < 0.001; for LA-S, r = 0.84, p < 0.001; for LA-SR, r = 0.79, p < 0.001, and for LA-LSV, r = 0.70, p < 0.001). In addition, a significant positive correlation was detected between LAA-S and LA-S (r = 0.85, p < 0.001). CONCLUSION: We suggest that LA-S and LA-SR imaging is a beneficial method to evaluate LAA functions noninvasively.
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Arslan et al. (2012) conducted an observational in Patients referred for transesophageal echocardiography (n=78). Left atrial strain (S) and strain rate (SR) imaging vs. Left atrial appendage late emptying velocity (LAA-EV) was evaluated on Correlation between LAA-EV and myocardial velocity imaging parameters (r = 0.84, p=<0.001). Left atrial strain (LA-S) and strain rate (LA-SR) imaging significantly correlated with left atrial appendage late emptying velocity (r=0.84 and r=0.79, respectively; P<0.001).
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