Key result
Transesophageal echocardiography modestly underestimated early diastolic mitral annular velocity compared to transthoracic echocardiography (6.6 vs 7.0 cm/s, P=0.028).
Why the study?
Clinicians routinely observe lower mitral annular velocities by TEE under anesthesia than by awake TTE, but whether this difference persists under constant loading conditions was unknown.
Does transesophageal echocardiography underestimate early diastolic mitral annular velocity compared to transthoracic echocardiography in adult patients undergoing cardiac surgery?
Comparison
TTE vs TEE measurements under anesthesia across AP 4Ch, ME 4Ch, and DTG views
Design
Prospective comparative study with randomized measurement order
Authors
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Discrepancies between awake TTE and anesthetized TEE diastolic grading warrant caution in perioperative assessment; leaves open whether anesthesia or modality drives differences.
Cross-Sectional (n=25)
Randomized order of imaging
Does transesophageal echocardiography underestimate early diastolic mitral annular velocity compared to transthoracic echocardiography in adult patients undergoing cardiac surgery?
Mean Difference: 0.6
Absolute Event Rate: 6.6% vs 7%
p-value: p=0.028
Transesophageal echocardiography modestly underestimates early diastolic mitral annular velocity compared to transthoracic echocardiography, but the difference is not clinically relevant.
Mauermann et al. (2021) conducted a cross-sectional in On-pump cardiac surgery (n=25). Transesophageal echocardiography (ME 4Ch view) vs. Transthoracic echocardiography (AP 4Ch view) was evaluated on Mean early diastolic mitral annular velocity (MD 0.6, p=0.028). Transesophageal echocardiography modestly underestimated early diastolic mitral annular velocity compared to transthoracic echocardiography (6.6 vs 7.0 cm/s, P=0.028).
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