Skip to main content

Table 1 Reproducibility in the whole cohort

From: Left atrial 4D flow cardiovascular magnetic resonance: a reproducibility study in sinus rhythm and atrial fibrillation

  1 2 3 4     
  Intra-observer
N = 84
Inter-observer
N = 75
Same-day rescan
N = 85
Interval Scan
N = 74
p value (1 vs. 2) p value (1 vs. 3) p value (2 vs. 3) p value (3 vs. 4)
LA stasis, %         
 CV (95% CI) 0.032 (0.023–0.041) 0.073 (0.052–0.097) 0.101 (0.080–0.124) 0.144 (0.116–0.175) < 0.001 < 0.001 0.076 0.015
 Bias (BA limits) 0.01 (− 0.02 to 0.02) 0.00 (− 0.09 to 0.07) 0.00 (− 0.09 to 0.09) − 0.01 (− 0.16 to 0.14)     
LA peak velocity, m/s         
 CV (95% CI) 0.012 (0.009–0.015) 0.080 (0.039–0.131) 0.065 (0.042–0.093) 0.068 (0.058–0.079) 0.007 < 0.001 0.645 0.795
 Bias (BA limits) 0.00 (− 0.01 to 0.01) 0.01 (− 0.09 to 0.07) 0.00 (− 0.05 to 0.06) 0.00 (− 0.05 to 0.06)     
LA mean velocity, m/s         
 CV (95% CI) 0.010 (0.008–0.013) 0.037 (0.025–0.051) 0.051 (0.038–0.064) 0.076 (0.063–0.088) < 0.001 < 0.001 0.134 0.007
 Bias (BA limits) 0.00 (0.00 to 0.00) 0.00 (− 0.01 to 0.01) 0.00 (− 0.020 to 0.022) 0.00 (− 0.03 to 0.03)     
LA vorticity, rad         
 CV (95% CI) 0.012 (0.010–0.014) 0.081 (0.041–0.126) 0.072 (0.052–0.094) 0.074 (0.059–0.090) 0.002 < 0.001 0.816 0.875
 Bias (BA limits) 0.00 (− 0.73 to 0.73) − 0.17 (− 4.67 to 4.32) − 0.01 (− 4.12 to 4.15) 0.41 (− 3.90 to 4.73)     
LA vortex volume, ml         
 CV (95% CI) 0.076 (0.053–0.099) 0.112 (0.083–0.143) 0.086 (0.059–0.115) 0.108 (0.080–0.137) 0.045 0.564 0.172 0.254
 Bias (BA limits) − 1.12 (− 5.44 to 3.05) − 1.18 (− 6.45 to 4.10) 0.42 (− 3.22 to 4.06) − 0.51 (− 7.32 to 60.30)     
  1. Within-subject coefficients of variation (CV, reported as proportion) are presented with bootstrapped 95% CIs (1000 bootstraps). Mean bias and Bland–Altman (BA) 95% limits of agreement are also reported. p values are obtained by bootstrapped differences (10,000 bootstraps) between CV values for each parameter. Significant p values (< 0.05) are shown in italic
  2. LA left atrial