Why the study?
Does transthoracic echocardiography accurately measure flow velocity in the left atrial appendage compared to transesophageal echocardiography in patients undergoing echocardiographic study?
Population
30 consecutive patients sent for echocardiographic study with diagnoses including stroke, mitral stenosis…
Comparison
Transthoracic echocardiography measurement of… vs Transesophageal echocardiography measurement of…
Design
Cross-sectional
Key result
Transthoracic echocardiography was highly correlated with transesophageal echocardiography for measuring left atrial appendage flow velocity (r=0.95) and detected FV <30 cm/sec with 88% sensitivity.
Authors
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May support noninvasive TTE for LAA velocity; leaves open prospective outcome validation before clinical use.
Cross-Sectional (n=30)
Does transthoracic echocardiography accurately measure flow velocity in the left atrial appendage compared to transesophageal echocardiography in patients undergoing echocardiographic study?
Effect estimate: r = 0.95
Absolute Event Rate: 32.7% vs 33.7%
p-value: p=NS
Transthoracic echocardiography provides flow velocity measurements in the left atrial appendage that correlate highly with transesophageal echocardiography, offering a potential non-invasive alternative for assessing systemic embolic risk.
Carranza et al. (1997) conducted a cross-sectional in Patients referred for echocardiography (n=30). Transthoracic echocardiography (TTE) vs. Transesophageal echocardiography (TEE) was evaluated on Mean flow velocity in the outlet of the left atrial appendage (cm/sec) (r = 0.95, p=NS). Transthoracic echocardiography was highly correlated with transesophageal echocardiography for measuring left atrial appendage flow velocity (r=0.95) and detected FV <30 cm/sec with 88% sensitivity.
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