Factors affecting blood pressure profile in pre and postmenopausal women with obstructive sleep apnea hypopnea syndrome.

PURPOSE: Obstructive sleep apnea hypopnea syndrome (OSAHS) is an independent risk factor for development of hypertension. Epidemiological surveys have found that risk of cardiovascular diseases increased in postmenopausal women. However, it is not well known about the profiles of hypertension of women with OSAHS in their different reproductive stages. This study aimed to investigate the difference of blood pressure profile between pre and postmenopausal women with OSAHS. METHODS: Women who were tested by polysomnography (PSG) (n = 207) in Ruijin Hospital were recruited in the study. The subjects were divided into two groups of premenopausal women (24 with and 30 without OSAHS), and two groups of postmenopausal women (116 with and 37 without OSAHS). Among the groups, the differences of demographic and PSG variables were compared. The factors influencing blood pressure were further studied. RESULTS: The prevalence of hypertension (56.9 %) in postmenopausal OSAHS patients was higher than the other three groups. Among OSAHS patients, both average systolic blood pressure (SBP) and diastolic blood pressure (DBP) of postmenopausal women were higher than those of premenopausal ones [(129.9 ± 16.16 mmHg vs. 123.7 ± 18.89), (84.96 ± 9.88 mmHg vs. 78.81 ± 10.34), P = 0.05, P < 0.01, respectively], with the elevation of DBP being more pronounced. For premenopausal women, body mass index (BMI) was the only factor affecting blood pressure (p < 0.05); in postmenopausal women, BMI was a factor affecting SBP, while BMI and apnea hypopnea index (AHI) affecting DBP (P < 0.05). CONCLUSION: Blood pressure profile of postmenopausal women with OSAHS was affected by both BMI and AHI. But those of premenopausal ones were predominantly related to BMI.

[Lipid frofile and hemorheology in obstructive sleep apnea-hypopnea syndrome.].

OBJECTIVE: To investigate whether there was a correlation between lipid level, hemorheology and the obstructive sleep apnea hypopnea syndrome. METHODS: Two hundred and thirty-one subjects in our sleep respiratory disease center between 2006 and 2009 were included. Eighty nine were obese OSAHS subjects, 62 were non-obese OSAHS subjects, 40 were obese subjects without OSAHS (obese group) and 40 were non-obese subjects without OSAHS (control group). We examined and compared the lipid profile and hemorheology in all subjects. RESULTS: In obese OSAHS group, the levels of triglyceride (TG) [(2.74 +/- 2.02) mmol/L], cholesterol (TC) [(5.14 +/- 0.96) mmol/L] were higher and HDL [(1.13 +/- 0.36) mmol/L], apoA-I [(1.20 +/- 0.20) mmol/L] were lower, compared to the non-obese OSAHS group (F = 7.77, 7.99, all P < 0.01). The level of the whole blood viscosity in obese OSAHS group was significantly higher than that in non-obese OSAHS group (F = 8.81-11.99, P < 0.05). There was no significant difference in blood lipid levels among the 2 study groups:non-obese OSAHS and control group, obese OSAHS and obese group (F = 6.42 - 11.99, P > 005). The levels of the whole blood viscosity and HCT were significantly higher in non-obese OSAHS group than in control group (F = 0.41 - 2.23, P < 0.05); obese OSAHS group were higher than obese group (F = 0.12 - 2.10, P < 0.05). No significant difference in blood lipid levels was noted among the 4 non-obese groups with different disease severity; similar result was also observed among obese OSAHS groups. CONCLUSIONS: Obesity is responsible for dyslipidemia in OSAHS. OSAHS has no significant correlation with lipid abnormalities, but it significantly correlates with hemorheology disorder.