The morning rise of systolic blood pressure (by 24-hour ambulatory monitoring) and platelet aggregability in essential hypertension patients

被引:0
|
作者
Oschepkova, EV [1 ]
Lazareva, NV [1 ]
Filatova, LV [1 ]
Zelveian, PA [1 ]
Rogova, AN [1 ]
Arabidze, GG [1 ]
机构
[1] AL Myasnikov Clin Cardiol Res Inst, Moscow, Russia
关键词
essential hypertension; morning rise of blood pressure; ADP-induced platelet aggregability; spontaneous platelet aggregability; monitoring;
D O I
暂无
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Aim. To investigate the relationship between platelet aggregability (PA) and parameters of blood pressure (BP) in patients,vith essential hypertension (EH). Materials and methods. We analyzed 24-h BP recordings (SL-90207, 15-min day and 30 min night lime intervals) of 47 hospitalized males with mild to moderate EH (mean age 48+/-1 years) to assess the following parameters: mean 24-h, awake (Aw) and nighttime (N) systolic (S) and diastolic (D) BP. We assessed the morning rise (MR) of BP using the new index: a relative morning rise of systolic BP-RMRSBP - (max value of SBP from 6 am to 12 am/mean asleep SBP) x 100%. The kinetics of mean aggregate size (MAS) changes was studied with aggregation analyzer model (230LA Biola Ltd., Russia). The following parameters were used for estimation of platelet aggregability: a relative increase in MAS 2 min after beginning of sample stirring - for spontaneous aggregation (SPA) and the maximum increase in the light transmission for 0.5 microM ADP-induced aggregation (ADPI-PA). The patients were divided into two groups according to the median value of RMRSBP: group 1 (n=25, RMRSBP<121%) and group 2 (n=22, RMRSBP>121%). The differences in estimated parameters were tested by Student two tailed t-tests and presented by M+/-SE. P<0.05 was considered statistically significant. Results. No significant differences have been found between the groups by mean age, body mass index, duration of arterial hypertension, mean 24-h, awake DBP and SEP. Statistically significant differences have been found between groups by SPA, ADPI-PA, night SBP, night DBP, RMRSBP, RMRDBP. In group 2 there was a correlation between RMRSBP and SPA, but nor in group 1. Conclusions. The morning rise of systolic BP is associated with an increase of ADP-induced and spontaneous platelet aggregability in the patients with mild to moderate essential hypertension and apparently that association is more pronounced at high values of morning BP (more than 20% from mean nocturnal values of SBP).
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页码:47 / 51
页数:5
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