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Table 2 Conventional echocardiographic parameters in different groups

From: Assessment of right atrium dysfunction in patients with obstructive sleep apnea syndrome using velocity vector imaging

  Control(n = 30) Mild(n = 23) Moderate(n = 25) Severe(n = 23)
RAL(mm) 4.13 ± 0.67 4.31 ± 0.67 4.44 ± 0.66 4.81 ± 0.78*
RAT(mm) 3.67 ± 0.73 3.90 ± 0.84 4.22 ± 0.72 4.54 ± 0.83*
VImax(ml/m2) 24.9 ± 4.17 26.9 ± 6.69 29.0 ± 5.75* 30.1 ± 6.15*
VImin(ml/m2) 11.0 ± 2.59 10.9 ± 3.56 12.7 ± 4.01 14.6 ± 4.54*
VIpre(ml/m2) 16.7 ± 3.34 17.5 ± 3.25 18.1 ± 2.88 19.8 ± 3.23*
RATEF (%) 67.8 ± 7.74 68.8 ± 6.43 69.3 ± 6.75 70.5 ± 7.98
RAPEF (%) 45.1 ± 7.00 41.4 ± 7.22 37.5 ± 6.33* 36.0 ± 7.87*
RAAEF (%) 53.6 ± 6.67 54.7 ± 6.72 58.8 ± 8.04* 57.9 ± 5.94
  1. *P < 0.05 vs controls; †P < 0.05 vs mild; ‡P < 0.05 vs moderate
  2. RAL RA longitudinal diameter, RAT RA transverse diameter, VImax RA maximum volume index, VImin right atrial minimum volume index, VIpre right atrial volume index before contraction, RATEF right atrial total emptying fraction, RAPEF right atrial passive emptying fraction, RAAEF right atrial active emptying fraction