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Table 4 Intra- and interobserver variabilities for the 2D speckle-tracking echocardiography-derived indices of left atrial myocardial function

From: Assessment of the ability of the CHA2DS2-VASc scoring system to grade left atrial function by 2D speckle-tracking echocardiography

Variable Intraobserver Interobserver
ICC 95% limit of agreement ICC 95% limit of agreement
LASr (%) 0.994 0.988–0.997 0.949 0.907–0.972
LAScd (%) 0.994 0.989–0.996 0.931 0.684–0.974
LASct (%) 0.992 0.984–0.996 0.921 0.849–0.958
pLASRr (1/s) 0.992 0.981–0.996 0.942 0.850–0.973
pLASRcd (1/s) 0.996 0.993–0.998 0.973 0.952–0.985
pLASRct (1/s) 0.993 0.977–0.997 0.944 0.897–0.969
  1. ICC, intraclass correlation coefficient; LAScd, left atrial longitudinal strain during the conduit phase; LASct, left atrial longitudinal strain during the contraction phase; LASr, left atrial longitudinal strain during the reservoir phase; pLASRcd, peak left atrial longitudinal strain rate during the conduit phase; pLASRct, peak left atrial longitudinal strain rate during the contraction phase; pLASRr, peak left atrial longitudinal strain rate during the reservoir phase