Abstract
Purpose of the study
The study was done to determine the clinical feasibility and reproducibility of tissue Doppler echocardiography (TDE) with strain rate imaging (SRI) at rest and under physical exercise in healthy young individuals and to report normal values for parameters of regional myocardial function under exercise.
Methods
Forty-five young volunteers (age 9–29 years) underwent echocardiography with TDE/SRI at rest and during a bicycle exercise test (2 W/kg body weight).
Results
Velocities could be obtained in 93% of segments, whereas strain rate was measurable at least in 80% of segments. Inter- and intraobserver variability for measurement of velocities under exercise was 14% and 9%, respectively for strain rate 28% and 20%. Except for peak strain, values for all other parameters were higher during exercise with the clearest response in the left lateral and the right ventricular wall.
Conclusions
(1) Tissue Doppler with strain rate imaging is a practical and robust method for assessment of regional function of both ventricles under exercise. (2) Systolic motion, local myocardial relaxation and contractility increased significantly under physical exercise. These normal values obtained from healthy young subjects can serve as a reference database for further clinical studies.
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Abbreviations
- HR:
-
heart rate
- LAX:
-
parasternal long axis
- LV:
-
left ventricle
- RV:
-
right ventricle
- SAX:
-
parasternal short axis
- SRA :
-
peak late diastolic strain rate
- SRE :
-
peak early diastolic strain rate
- SRS :
-
peak systolic strain rate
- SRI:
-
strain rate imaging
- TDE:
-
tissue Doppler echocardiography
- V A :
-
peak late diastolic myocardial velocity
- V E :
-
peak early diastolic myocardial velocity
- V S :
-
peak systolic myocardial velocity
- \(\varepsilon\) :
-
peak overall strain
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The authors Björn Goebel and Raoul Arnold have contributed equally to this work
An erratum to this article can be found at http://dx.doi.org/10.1007/s10554-006-9159-7
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Goebel, B., Arnold, R., Koletzki, E. et al. Exercise tissue Doppler echocardiography with strain rate imaging in healthy young individuals: feasibility, normal values and reproducibility. Int J Cardiovasc Imaging 23, 149–155 (2007). https://doi.org/10.1007/s10554-006-9130-7
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DOI: https://doi.org/10.1007/s10554-006-9130-7