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Table 7 Assessment of inter- and intra-observer measurement error and repeatability according to the British Standards Institution guidelines and coefficients of variation

From: Assessment of atrial regional and global electromechanical function by tissue velocity echocardiography: a feasibility study on healthy individuals

  Inter-observer Intra-observer
Variable BSI CV (%) BSI CV (%)
P-Aa' start, ms 37 24 28 19
P-Aa' peak, ms 51 16 47 14
Aa' duration, ms 32 8.8 25 7.5
TEMA, ms 53 9.7 45 8.2
Aa' peak velocity, cm/s 2.14 10.1 1.78 8.7
Aa' displacement, mm 1.81 12.3 1.77 11.8
Aa' SR -0.79 9.4 -0.71 7.8
Aa' S, % 5.4 9.6 4.5 9.1
LA maximal volume, mL 22 18.4 18 14.7
  1. Abbreviations: BSI, British Standards Institution; CV, coefficient of variation; otherwise as in Table 3.