Resting heart rate and target organs damage in senile metabolic syndrome
- VernacularTitle:老年代谢综合征患者静息心率与靶器官损害
- Author:
Xueqiu LIU
;
Yanjun WANG
;
Zhifu LIU
- Publication Type:Journal Article
- Keywords:
Metabolic syndrome;
Resting heart rate;
Target organs damage;
Senile
- From:
Clinical Medicine of China
2008;24(12):1252-1256
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the relationship between resting heart rate (RHR) and target organs damage (TOD) in senile metabolic syndrome(SMS). Methods With case-control study,215 elderly patients with MS were divided into 3 groups according to the level of RHR [RHR1 group: RHR <70 beats/ minute (bpm) (n=55);RHR2group: 70 bpm ≤RHR<80 bpm [n=87);RHR3 group: RHR≥80 bpm (n=73).Mean-while ,60 healthy senile persons were taken as normal control group. For all objects researched, electrocardiography, echocardiography,carotid ultrasonography, creatinine clearance rate (Ccr) and quantitative assay for 24 hours' urina-ry microalbuminuria (MAU) were performed. Part of SMS patients was examined by coronary angiography and com-puter tomography (CT) of head. Results ① Compared with normal control group, RHR groups showed higher lev-els of carotid intima-medial thickness (IMT), carotid arterial diameter (CAD), left ventricular mass index (LVMI) and MAU, lower levels of left ventricular ejection fraction (LVEF) and Ccr (P<0.05 or 0.01). With RHR increas-ing among RHR groups,IMT,CAD,LVMI,MAU and the score of coronary artery stenosis increased,and LVEF and Cer decreased (P<0.05 or 0.01). ② The levels of IMT, CAD, LVMI and MAU were positively correlated to RHR (r=0.34,0.25,0.62, and 0.57, respectively, P<0.05 or 0.01). However, the levels of LVEF and Ccr were nega-tively correlated to RHR (r=-0.60,-0.52 respectively,P<0.01). ③ Logistic multivariate analysis showed that RHR, pulse pressure (PP), systolic blood pressure (SBP) and diastolic blood pressure (DBP) influenced TOD,such as myocardial hypertrophy,coronary heart disease,heart failure, cerebral stroke and renal damage in dif-ferent degrees, among them, PP and RHR played more important roles than those of other factors. Conclusion RHR may be an independent risk factors of TOD in senile MS. It is indicated that RHR regulation is important for the de-velopment of senile MS.
