Hypertension in Older Adults

Hypertension is persistently elevated arterial blood pressure and is one of the most common chronic conditions of later life. In older adults it often takes the form of isolated systolic hypertension driven by arterial stiffening, and it is a leading modifiable risk factor for stroke, heart failure, and cardiovascular death.

Definition

Hypertension is a chronic condition of persistently raised systemic arterial blood pressure; in older adults it commonly appears as isolated systolic hypertension, in which systolic pressure is elevated while diastolic pressure is normal or low, reflecting reduced large-artery compliance.

Scope

The entry covers how hypertension presents and behaves in older adults, the physiology of age-related arterial stiffening, and the evidence that blood-pressure lowering can reduce cardiovascular events even in the very old. It is a reference topic within common geriatric conditions and does not provide blood-pressure targets or drug recommendations for individuals.

Core questions

• How does hypertension differ in older adults compared with younger patients?
• What is isolated systolic hypertension and why does it predominate with age?
• What cardiovascular outcomes is hypertension associated with in later life?
• What does trial evidence show about treating hypertension in the very old?

Key concepts

• Isolated systolic hypertension
• Arterial stiffening and reduced compliance
• Widened pulse pressure
• Cardiovascular risk (stroke, heart failure)
• Orthostatic hypotension as a competing concern
• Frailty as a modifier of treatment benefit

Mechanisms

With aging, large arteries such as the aorta lose elastin and accumulate collagen, becoming stiffer and less able to buffer the pressure wave of systole. This raises systolic pressure and pulse pressure while diastolic pressure may fall, producing the isolated systolic pattern typical of older adults. Sustained elevation increases afterload on the heart and shear stress on vessels, contributing to left ventricular hypertrophy, heart failure, stroke, and renal injury. Age-related changes in baroreflex sensitivity also make older adults more prone to orthostatic blood-pressure drops.

Clinical relevance

Because hypertension is highly prevalent and a major driver of cardiovascular events, its appraisal is central to geriatric care, where the potential benefits of blood-pressure lowering are weighed against frailty, orthostatic hypotension, and polypharmacy. This entry describes the condition and the evidence base for reference and education; it is not a basis for individual diagnostic or treatment decisions.

Epidemiology

Hypertension prevalence increases with age and affects a majority of adults in the oldest age groups, with isolated systolic hypertension becoming the dominant form. It is among the most common chronic diagnoses in older populations and a leading contributor to the global burden of stroke and heart disease.

History

For decades there was uncertainty about whether lowering blood pressure benefited the very old. The HYVET trial, which enrolled patients aged 80 and over, demonstrated that treatment reduced stroke and other outcomes, and the later SPRINT trial examined more intensive blood-pressure targets including in older participants, sharpening the discussion about how aggressively to treat hypertension across the spectrum of aging and frailty.

Debates

How intensively should blood pressure be lowered in older and frailer adults?

Trials such as SPRINT suggested benefit from more intensive control, but applicability to frail individuals, those with orthostatic hypotension, and the oldest old is debated, given competing risks and tolerability.

Seminal works

• beckett-2008
• sprint-2015

Frequently asked questions

Why is isolated systolic hypertension so common in older adults?

Aging stiffens the large arteries, so they buffer the systolic pressure wave less effectively; systolic pressure rises while diastolic pressure stays normal or falls, producing isolated systolic hypertension.

Does treating hypertension still help in very old patients?

Trial evidence, including a randomized trial in patients aged 80 and over, indicates that blood-pressure lowering can reduce cardiovascular events even in the very old, although individual benefit must be weighed against frailty and tolerability.