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Table 2 Basic characteristics and left ventricular structure and function indices in overall obstructive sleep apnoea patients before and after 6 months of continuous positive airway pressure (CPAP) treatment.

From: Effects of CPAP on right ventricular myocardial performance index in obstructive sleep apnea patients without hypertension

  CPAP treatment p-value
Overall (n = 18) Before After  
Basic characteristics
BMI kg*m-2 (<30)* 30.6 ± 4,0 31,0 ± 3,5 NS
SBP mmHg (<140)* 120.3 ± 10.1 119,1 ± 10,2 NS
DBP mmHg (<90)* 82.0 ± 4.1 81.2 ± 3,8 NS
Left ventricular structure
Left atrium mm (19–40)* 35.1 ± 3.2 36.0 ± 3.0 NS
IVS thickness mm (6–11)* 10.3 ± 1.1 10,4 ± 1,0 NS
LVPW thickness mm (6–11)* 10.1 ± 0.8 10,0 ± 0,9 NS
LVEDD mm (37–56)* 47.1 ± 4.1 46.1 ± 4.3 NS
LVESD mm (19–40)* 32.2 ± 4.8 31.8 ± 4.7 NS
Diastolic functions
E/A ratio (>1)* 1.6 ± 0.1 1.6 ± 0.2 NS
IVRT ms (<100)* 80.0 ± 12.0 81.1 ± 12.6 NS
DT ms (<220)* 180.2 ± 16.5 179.5 ± 16.8 NS
VPR cm*s-1 (>55)* 89.2 ± 10.6 88.6 ± 10.3 NS
Systolic function
LVEF % (55–75)* 64.0 ± 4.9 64,1 ± 4,7 NS
Global function
MPI % (39 ± 5)* 37.2 ± 6.0 36.8 ± 5.8 NS
  1. Data are presented as mean ± SD. *Normal values, BMI: Body mass index, SBP: Systolic blood pressure, DBP: Diastolic blood pressure, IVS: Ýnterventricular septum, LVPW: Left ventricular posterior wall, LVEDD: Left ventricular end diastolic diameter, LVESD: Left ventricular end systolic diameter, E/A: Ratio of early and lately mitral flow velocity, IVRT: Ýsovolumic relaxation time, DT: Mitral deceleration time, VPR: Velocity of mitral flow propagation, LVEF: Left ventricular ejection fraction, MPI: Myocardial performance index of left ventricle, NS: nonsignificant.