Reproducibility of Pulsed Wave Tissue Doppler Echocardiography☆,☆☆
Section snippets
Patients
We studied prospectively 16 patients (55 ± 10 years; 10 men, 6 women) referred for radionuclide ventriculography and transthoracic echocardiography. The clinical indication for referral was assessment of myocardial perfusion and global cardiac function. Patients who were not in sinus rhythm or who had clinical evidence of valvular disease, uncompensated heart failure, or unstable coronary heart disease were excluded.
Seven patients were found to have normal results on rest and stress
Recordings
Four hundred eighty paired recordings obtained from 16 patients (5 segments/patient, 3 variables/segment, 240 recordings each for the analysis of intraobserver and interobserver variability) were compared to determine the reproducibility of both acquiring and measuring peak systolic and diastolic myocardial velocities.
Intraobserver Variability (Table 1)
For the left ventricle, intraobserver variability of peak systolic velocities was not more than 15%. It was slightly lower for the long-axis velocities (±12% and ±13% for the
Our Study
To the best of our knowledge, this study is the first to assess reproducibility of both acquiring and measuring systolic and diastolic velocities recorded by TDE in a large number of paired recordings.
In our study the lateral mitral annulus had the best reproducibility for both systolic and diastolic velocities (not more than ±17% and ±20% for systolic and diastolic function, respectively), probably because it is an easy site from which to record and the Doppler angle of incidence is favorable.
Acknowledgements
We are grateful to Dr Frank Dunstan for his advice on statistical analysis.
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Dr Vinereanu held a Training Fellowship from the European Society of Cardiology.
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