Can transesophageal pulse-wave tissue Doppler imaging be used to evaluate left ventricular function?

Area of Science:

• Cardiology
• Echocardiography
• Cardiac Physiology

Background:

• Left ventricular function assessment is crucial in cardiovascular diagnostics.
• Transesophageal echocardiography offers an alternative imaging approach.
• Tissue Doppler echocardiography (TDE) provides insights into myocardial velocities.

Purpose of the Study:

• To evaluate the efficiency of transesophageal TDE compared to transthoracic TDE.
• To assess the reliability of TDE in measuring left ventricular function parameters.
• To compare simultaneous measurements from both echocardiographic modalities.

Main Methods:

• Nineteen patients underwent simultaneous transthoracic (TTE) and transesophageal (TEE) TDE.
• Mitral annular velocities (S, E, A), E/A ratio, deceleration time (DT), and isovolumetric relaxation time (IVRT) were measured.
• Bland-Altman analysis and Mann-Whitney U test were used for statistical comparison.

Main Results:

• No significant differences in blood pressure or heart rate between techniques.
• Comparable values for E, A, E/A, and S parameters were observed.
• Significant differences were noted in deceleration time (DT) and isovolumetric relaxation time (IVRT) measurements.

Conclusions:

• Transesophageal TDE is a potentially suitable method for left ventricular function assessment.
• The findings support the use of TEE-based TDE as a viable alternative to TTE.
• Further validation may be needed for specific parameters like DT and IVRT.