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Dyslipidemic hypertension: distinctive features and cardiovascular risk in a prospective population-based study
Altan Onat1, Gülay Hergenç, Ibrahim Sari
1Turkish Society of Cardiology, Biology Department, Nisbetiye cad. 37/24 Etiler, 80630 Istanbul, Turkey. tkd@tkd.org.tr
Insights
Dyslipidemic hypertension (DH), affecting 1 in 6 adults, significantly increases cardiovascular disease (CVD) risk compared to simple hypertension. DH patients face nearly half the CVD risk attributed to metabolic syndrome.
Area of Science:
- Cardiology
- Metabolic Disorders
- Epidemiology
Background:
- Investigated cardiovascular disease (CVD) prevalence, features, and risk in dyslipidemic hypertension (DH).
- Defined DH using blood pressure, triglycerides, and HDL-cholesterol per National Cholesterol Education Program guidelines.
- Distinguished DH from simple hypertensives (SH) based on these criteria.
Purpose of the Study:
- To assess the CVD risk associated with dyslipidemic hypertension (DH).
- To characterize the features of DH.
- To compare CVD risk in DH versus simple hypertensives (SH) and metabolic syndrome.
Main Methods:
- Prospective population-based study of 2225 adults free of CVD at baseline.
- Follow-up for a mean of 4.1 years, recording fatal and nonfatal CVD events.
- Defined DH, SH, and normotensive groups; assessed metabolic syndrome prevalence.
Main Results:
- DH individuals exhibited higher BMI, apolipoprotein B, fasting insulin, glucose, and C-reactive protein than SH.
- Cox regression revealed a 1.57-fold higher hazard ratio (HR) for CVD in DH versus SH, adjusted for key factors.
- DH showed a 1.45-fold higher adjusted HR for CVD compared to other subjects with metabolic syndrome.
Conclusions:
- Dyslipidemic hypertension (DH), prevalent in 16% of adults, presents distinct features and elevated CVD risk.
- DH confers a higher CVD risk than simple hypertension (SH).
- DH carries approximately half the attributable cardiovascular risk associated with metabolic syndrome.
Background:
The prevalence, features, and risk of cardiovascular disease (CVD) in dyslipidemic hypertension (DH) was investigated in a prospective population-based study. Dyslipidemic hypertension was defined in terms of blood pressure, plasma triglycerides, and HDL-cholesterol consistent with the metabolic syndrome criteria of the National Cholesterol Education Program guidelines. High-normal or hypertensive values not meeting the other two criteria were designated as "simple hypertensives" (SH).
Methods:
A sample of 2225 men and women and free of CVD at baseline were followed up for a mean of 4.1 years. The proportions of DH, SH, and normotensives were 16%, 37%, and 47%, respectively. All persons with DH had metabolic syndrome by definition, whereas metabolic syndrome formed 44.6% of SH. Fatal and nonfatal CVD, diagnosed by clinical findings and Minnesota coding of resting electrocardiograms, developed in 166 subjects.
Results:
Compared to SH, sex- and age-standardized individuals with DH had significantly higher body mass index, apolipoprotein B, fasting insulin, glucose, and C-reactive protein levels, had higher prevalence of impaired fasting glucose and metabolic syndrome. Cox regression analysis revealed a 1.57-fold higher (confidence interval 1.08-2.28) hazard ratio (HR) for CVD in DH than in SH, after adjustment for sex, age, LDL-cholesterol, and smoking status. The sex- and age-adjusted HR of DH was furthermore 1.45-fold higher than the remaining subjects with metabolic syndrome (P = .096). Among persons with DH, age, presence of diabetes, and pulse pressure proved to be independent predictors for CVD. High LDL-cholesterol levels and fasting hyperinsulinemia were associated with borderline significantly elevated relative risks among dyslipidemic hypertensives.
Conclusions:
Dyslipidemic hypertension, prevailing in 1 of every 6 adults, implicates characteristic features, confers excess CVD risk compared to the remainder of hypertensives and carries half the attributable cardiovascular risk due to metabolic syndrome.
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