Association between ambulatory blood pressure levels and blood pressure variability with myocardial performance index in untreated hypertensive patients
10.3760/cma.j.issn.0253-3758.2015.04.005
- VernacularTitle:动态血压水平和血压变异性与心肌做功指数的关系
- Author:
Shaomin CHEN
1
;
Baoxia CHEN
;
Ying NIE
;
Xinheng FENG
;
Zhaoping LI
;
Lijun GUO
;
Wei GAO
Author Information
1. 100191,北京大学第三医院心内科心血管分子生物学与调节肽卫生部重点实验室
- Keywords:
Hypertension;
Blood pressure variability
- From:
Chinese Journal of Cardiology
2015;43(4):304-307
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the association between ambulatory blood pressure levels and blood pressure variability (BPV) with myocardial performance index (MPI) in untreated hypertensive patients.Methods From January to September 2013,a total of 81 untreated hypertensive patients were included in this study.All patients received ambulatory blood pressure monitoring and echocardiography measurements.MPI was determined in all patients by the following formula:MPI =(isovolumic contraction time + isovolumic relaxation time)/ejection time.The patients were divided into two groups according to left ventricular MPI:patients with MPI ＞ 0.47 (n =39) and patients with MPI ≤ 0.47 (n =42).The mean levels and standard deviation (SD) of 24 h,daytime and nighttime blood pressures were compared between the two groups.SD was used to express BPV.Determinants of MPI were identified by multivariate regression analysis.Results 24 h and daytime systolic blood pressure,24 h,daytime and nighttime diastolic blood pressure,as well as SD of 24 h and daytime systolic blood pressure ((130.1 ± 8.7),(134.0 ± 8.2),(89.1 ±6.3),(90.9 ±6.4),(83.1 ±9.9),(13.7 ± 3.3) and(14.2 ± 3.5) mmHg(1 mmHg =0.133 kPa),respectively) were significantly higher in patients with MPI ＞ 0.47 than those ((124.8 ± 8.7),(126.7 ±8.8),(84.5 ±7.1),(86.2 ± 7.4),(76.4 ± 7.5),(11.8 ±2.1) and(10.4 ± 1.9) mmHg,respectively) in patients with MPI≤0.47 (all P ＜ 0.05).Multivariate regression analysis showed that 24 h diastolic blood pressure (β =0.239,P =0.007) and SD of 24 h systolic blood pressure (β =0.333,P ＜0.001),left ventricular mass index and early diastolic mitral annular velocity were independently associated with MPI.Conclusion The increase of diastolic blood pressure and systolic BPV are associated with the deterioration of left ventricular function.
