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Haemodynamic characteristics in elderly patients with isolated systolic hypertension
T Sumimoto1, M Mukai, E Murakami
1Second Department of Internal Medicine, Ehime University School of Medicine, Japan.
Insights
Elderly patients with isolated systolic hypertension (ISH) show decreased systemic arterial compliance and baroreflex sensitivity. Cardiac function remains normal in ISH, unlike essential hypertension.
Area of Science:
- Cardiovascular Physiology
- Geriatric Medicine
- Hypertension Research
Background:
- Isolated systolic hypertension (ISH) is prevalent in the elderly.
- Understanding the hemodynamic profile of ISH is crucial for effective management.
- Distinguishing ISH from essential hypertension (EHT) aids in targeted therapeutic strategies.
Purpose of the Study:
- To compare systemic arterial compliance, baroreflex sensitivity, and cardiac function in elderly ISH patients versus EHT patients and normotensive (NT) subjects.
- To identify the predominant hemodynamic characteristics of ISH.
- To elucidate differences in cardiac function between ISH and EHT.
Main Methods:
- Cross-sectional study comparing three groups: ISH (n=12), EHT (n=12), and NT (n=7) of similar age.
- Assessment of systemic arterial compliance.
- Measurement of baroreflex sensitivity index.
- Evaluation of cardiac function using the pre-ejection period index (PEPI).
Main Results:
- Systemic arterial compliance was significantly decreased in the ISH group compared to NT and EHT.
- Baroreflex sensitivity indices were similarly reduced in both ISH and EHT groups.
- The pre-ejection period index (PEPI) was normal in ISH patients, but significantly prolonged in EHT patients.
Conclusions:
- ISH in the elderly is characterized by reduced large artery compliance and impaired baroreflex sensitivity.
- Cardiac function, as assessed by PEPI, appears preserved in ISH, contrasting with EHT.
- These findings highlight distinct hemodynamic profiles differentiating ISH from EHT, guiding clinical understanding and management.
Abstract:
Systemic arterial compliance, baroreflex sensitivity index and cardiac function were studied in elderly patients with isolated systolic hypertension (ISH, n = 12) comparing values with those of essential hypertensive patients (EHT, n = 12) and normotensive subjects (NT, n = 7) in the same age range. Systemic arterial compliance of the ISH group was markedly decreased. Baroreflex sensitivity indices of ISH and EHT were similarly decreased. Pre-ejection period index (PEPI) of ISH was normal, whereas PEPI of EHT was significantly longer than that of NT. These results demonstrate that of the haemodynamic characteristics of ISH, the predominant features are a decrease in compliance of large arteries with a disturbance of baroreflex sensitivity and normal cardiac function.