Journal
EUROPEAN JOURNAL OF ECHOCARDIOGRAPHY
Volume 11, Issue 2, Pages 149-156Publisher
OXFORD UNIV PRESS
DOI: 10.1093/ejechocard/jep188
Keywords
Repeatability; Myocardial deformation; Tissue Doppler; Speckle tracking; Systolic function; Diastolic function
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Funding
- Norwegian Research Council, through the centre for research based innovation, MI-Lab
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The study aimed to compare the inter-observer reproducibility of new and traditional measurements of the left ventricular (LV) global and regional function. Two experienced echocardiographers performed 20 complete echo/Doppler examinations and 50 analyses on ten healthy subjects. All recordings were analysed for systolic and diastolic conventional and deformation measurements by both echocardiographers. Inter-observer mean error (absolute difference divided by the mean) was 4% and lowest (P = 0.001) for systolic M-mode annulus excursion. Mean error for the regional deformation indices was significantly higher than for all the global measurements (all P < 0.001). Mean error for analyses of the same recording was 34% (P = 0.002) lower for global systolic indices and 44% (P < 0.001) lower for global diastolic indices than inter-observer mean error for analyses made in separate recordings. Systolic M-mode annulus excursion showed better inter-observer reproducibility than other traditional and newer measurements of LV systolic and diastolic function. Repeated analyses of the same recordings underestimate the more clinically relevant inter-observer reproducibility by similar to 40% for most measurements of LV function.
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