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Table 4 Myocardial velocity and velocity-derived variables measured at right and left atrial myocardial walls.

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

Variables Level RA IAS LA-Lat LA-Inf LA-Ant LA-Post P*
Aa' peak vel. Low 8.1 ± 2.7 6.3 ± 1.4 6.2 ± 1.7 6.9 ± 1.8 6.3 ± 1.8 6.8 ± 1.8 NS
(cm/s) Mid 6.9 ± 2.4 5.2 ± 1.5 5.7 ± 1.4 5.1 ± 1.7 5.7 ± 1.8 5.4 ± 1.7 NS
  P < 0.001 < 0.001 < 0.001 < 0.001 < 0.01 < 0.001  
Aa' disp. Low 6.7 ± 2.3 4.5 ± 0.9 3.7 ± 1.0 4.2 ± 1.0 4.1 ± 1.2 4.0 ± 0.9 NS
(mm) Mid 5.8 ± 2.5 3.2 ± 0.9 3.4 ± 0.9 2.9 ± 0.7 3.1 ± 1.3 3.0 ± 0.8 NS
  P < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001  
Aa' cont. Low 31 ± 10 33 ± 8 29 ± 10 28 ± 7 31 ± 12 26 ± 6 NS
(%) Mid 27 ± 11 24 ± 7 25 ± 9 19 ± 6 23 ± 11 19 ± 5 NS
  P < 0.001 < 0.001 0.02 < 0.001 < 0.001 < 0.001  
Aa' SR (s- 1 )   -4.9 ± 0.8 -2.7 ± 0.7 -3.7 ± 0.9 -3.2 ± 0.8 -3.3 ± 1.0 -3.7 ± 1.0 0.001
Aa' S (%)   29 ± 7 14 ± 5 15 ± 4 16 ± 5 15 ± 6 16 ± 4 NS
  1. Abbreviations: Aa' cont., atrial contribution; Aa' disp., atrial displacement; Aa' peak vel., atrial A-wave peak velocity; Aa' S, atrial strain; Aa' SR, atrial strain rate: P, paired t test; P*, analysis of variance; otherwise as in Table 3a.
  2. Aa' peak vel Low: RA vs IAS, LA-Lat and LA-Ant (P < 0.001). No differences were found between any LA walls.
  3. Aa' peak vel Mid: RA vs IAS, LA-Inf, LA-Post and LA-Ant (P < 0.001). No differences were found between any LA walls.
  4. Aa' disp. Low and Mid: RA vs all walls (P < 0.001). No differences were found between any LA-walls.
  5. Aa' cont. Low and Mid: No differences were found between walls
  6. Aa' SR: RA vs all LA walls (P < 0.001), IAS vs LA-Lat and LA-Post (P < 0.001)
  7. Aa' S: RA vs all LA walls (P < 0.001). No differences were found between any LA walls.