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Target organ damage and cardiovascular risk factors among subjects with previously undiagnosed hypertension
Päivi E Korhonen1, Hannu Kautiainen2, Salme Järvenpää3
1Central Satakunta Health Federation of Municipalities, Harjavalta, Finland Satakunta Hospital District, Pori, Finland Institute of Clinical Medicine, Family Medicine, University of Turku, Turku, Finland paivi.e.korhonen@fimnet.fi.
Insights
Undiagnosed hypertension is common, with 22% of patients showing signs of target organ damage. Many also have multiple cardiovascular risk factors, indicating a high risk for future events.
Area of Science:
- Cardiology
- Nephrology
- Public Health
Background:
- Prevalence of target organ damage in undiagnosed hypertension is largely unknown.
- Subclinical organ damage and cardiometabolic risk factors are key indicators of cardiovascular risk.
Purpose of the Study:
- To determine the prevalence of subclinical target organ damage in individuals with previously undiagnosed hypertension.
- To assess the association between undiagnosed hypertension and cardiometabolic risk factors.
Main Methods:
- Cross-sectional population survey.
- Measured ankle-brachial index (ABI), estimated glomerular filtration rate (eGFR), and electrocardiographically determined left ventricular hypertrophy (ECG-LVH).
- Included individuals with undiagnosed hypertension (n=138) and normotensive at-risk individuals (n=440).
Main Results:
- 22% of individuals with undiagnosed hypertension showed evidence of subclinical organ damage (ECG-LVH, ABI ≤ 0.90, or eGFR < 60 ml/min/1.73 m(2)).
- No significant difference in renal insufficiency prevalence between groups.
- Most individuals with undiagnosed hypertension had multiple cardiometabolic risk factors.
Conclusions:
- One in five patients with previously undiagnosed hypertension exhibit subclinical target organ damage.
- Three in four patients with undiagnosed hypertension may be considered at high cardiovascular risk.
Background:
Little is known about the prevalence of target organ damage in previously undiagnosed hypertension.
Design:
Cross-sectional population survey.
Methods:
We measured ankle-brachial index (ABI), estimated glomerular filtration rate (eGFR), electrocardiographically determined left ventricular hypertrophy (ECG-LVH), and cardiometabolic risk factors in subjects with previously undiagnosed hypertension (n = 138) and normotensive (n = 440) risk subjects, who had metabolic syndrome, glucose disorders, body mass index ≥ 30 kg/m(2) or a 10-year risk of cardiovascular disease death of 5% or more according to the Systematic Coronary Risk Evaluation (SCORE) system. None of the subjects had established cardiovascular or renal disease or previously diagnosed diabetes.
Results:
There was no difference (p = 0.68) among the studied age-groups in the prevalence of previously undiagnosed hypertension, and no interaction (p = 0.10) was found between sex and age groups. Evidence of subclinical organ damage defined as ECG-LVH, ABI ≤ 0.90, or eGFR < 60 ml/min/1.73 m(2) were found in 22% of the subjects with previously undiagnosed hypertension, and 8% of the non-hypertensive risk persons (p < 0.001). The prevalence of renal insufficiency did not differ between the study groups. Majority of the subjects with previously undiagnosed hypertension also have multiple cardiometabolic risk factors.
Conclusions:
Among subjects with previously undiagnosed hypertension, one in five patients had evidence of subclinical target organ damage, and three in four patients may be regarded as having high cardiovascular risk.
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