Table 2. Comparison of the echocardiographic diastolic function parameters in obstructive sleep apnoea syndrome patients with four kinds of left ventricular geometry ( ± s).

	NG (n = 71)	CR (n = 40)	EH (n = 34)	CH (n = 36)
MV E peak (cm/s)	78.00 ± 14.11	76.12 ± 17.34	75.11 ± 18.10Δ	55.14± 13.12*,Δ
MVA peak (cm/s)	68.36 ± 16.36	76.52 ± 17.40	76.75 ± 21.57	73.88 ± 20.94
MV E/A	1.01 ± 0.29	0.97 ± 0.18*	0.97 ± 0.15*	0.74 ± 0.24*,Δ
DT (ms)	120.50 ± 51.90	123.84 ± 59.84	138.31 ± 44.52	167.13 ± 44.52
IVRT (ms)	100.28 ± 25.89	107.55 ± 20.81	99.00 ± 22.06	114.94 ± 24.32
Em (cm/s)	13.51 ± 1.44	10.20 ± 0.92*	8.32 ± 1.27*,#	6.15 ± 1.07*,#,Δ
Am (cm/s)	10.46 ± 1.27	10.87 ± 1.22*	9.90 ± 0.91*,#	8.41 ± 0.82*,#,Δ
Em/Am	1.29 ± 0.13	0.95 ± 0.15*	0.83 ± 0.10*,#	0.73 ± 0.12*,#,Δ
E/Em	7.78 ± 0.81	7.23 ± 1.27	9.09 ± 1.78*,#	12.35 ± 2.41*,#,Δ
S(cm/s)	50.67 ± 9.30	54.05 ± 11.69	51.45 ± 10.99	54.69 ± 8.63
D (cm/s)	37.00 ± 8.06	34.87 ± 5.25	36.88 ± 16.72	38.68 ± 9.46
S/D	1.42 ± 0.35	1.67 ± 0.45	1.53 ± 0.25	1.48 ± 0.36
PVa (cm/s)	25.10 ± 4.02	28.80 ± 5.12	30.30 ± 4.10	30.60 ± 6.15
Vp (cm/s)	62.25 ± 4.02	60.14±5.12	58.02 ± 4.10	57.00 ± 6.15

Compared with the NG group,

^*p < 0.05;

compared with the CR group,

^#p < 0.05;

compared with EH group,

^Δp < 0.05.

E peak: left ventricular early diastolic peak velocity; A peak: left ventricular late diastolic peak velocity; DT: E peak deceleration time; IVRT: left ventricular isovolumic relaxation time; the Doppler tissue blood flow spectrum of the interventricular septum of the mitral ring; Em: early diastolic peak velocity; Am: late diastolic peak velocity; the blood flow spectrum of the right upper pulmonary vein: S-wave: ventricular contraction wave peak; D-wave: ventricular diastolic wave peak; PVa: the backwards blood flow wave velocity in atrial contraction; Vp: left ventricular early diastolic flow velocity of propagation