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Table 5 Intra- and inter-observer variability of circumferential and radial strain parameters of the LV at rest and with dobutamine stress

From: Cardiovascular magnetic resonance myocardial feature tracking detects quantitative wall motion during dobutamine stress

Parameter Ventricle Variability Mean CI (95%) p-value
Ecc SAX LV Intra-observer 24.1 22.3-25.8 0.06
    22.7 20.8-24.6  
   Inter-observer 24.1 22.3-25.8 0.61
    24.6 22.6-26.6  
Ecc SAX10 LV Intra-observer 32.7 29.8-35.8 0.09
    31.1 28.3-34.9  
   Inter-observer 32.7 29.8-35.8 0.66
    33.4 29.9-37  
Ecc SAX20 LV Intra-observer 39.2 35.2-43.1 0.25
    41 37.9-43.9  
   Inter-observer 39.2 35.2-43.1 0.17
    41.2 37.8-44.6  
Err SAX LV Intra-observer 19.6 15.8-23.4 0.86
    19.9 16.5-23.2  
   Inter-observer 19.6 15.8-23.4 0.06
    25.4 22.3-28.4  
Err SAX10 LV Intra-observer 31.8 26.9-37.9 0.2
    34.9 29.9-39.8  
   Inter-observer 31.8 26.9-37.9 0.14
    35.5 30.7-40.3  
Err SAX20 LV Intra-observer 42.4 35.8-48.9 0.31
    44.9 36.2-49.1  
   Inter-observer 42.4 35.8-48.9 0.59
    43.5 38.4-48.5  
  1. The table shows intra- and inter-observer variability of circumferential and radial strain parameters of the LV derived from a short-axis view at rest and with dobutamine stress (10 and 20 μg · kg-1· min-1). 95% Confidence Intervalls of the difference and p-values are given to accurately determine individual variabilities [12]. Ecc SAX = left ventricular short-axis circumferential strain, Err SAX = left ventricular short-axis radial strain,