Pathophysiology of hypertension in the elderly

Area of Science:

• Cardiovascular Medicine
• Gerontology
• Physiology

Background:

• Hypertension is a major cardiovascular risk factor that worsens with age.
• Diastolic blood pressure stabilizes around age 50, causing pulse pressure to rise in the elderly.
• Isolated systolic hypertension with widened pulse pressure is prevalent in individuals over 65.

Purpose of the Study:

• To explain the physiological mechanisms behind age-related hypertension.
• To highlight pulse pressure as a critical predictor of cardiovascular disease.
• To discuss factors influencing arterial stiffness and potential therapeutic interventions.

Main Methods:

• Review of studies measuring large artery stiffness using pulse-wave velocity and augmentation index.
• Analysis of the relationship between arterial stiffness, aging, and blood pressure changes.
• Examination of factors that decrease arterial stiffness.

Main Results:

• Arterial stiffness, characterized by structural and functional changes in the aorta and large vessels, increases with age.
• Early return of reflected pulse waves in systole is the primary cause of increased systolic and decreased diastolic pressure.
• Pulse pressure is a robust predictor of cardiovascular disease.

Conclusions:

• Age-related arterial stiffness is the main driver of isolated systolic hypertension in older adults.
• Factors like aerobic exercise, reduced sodium intake, n-3 fatty acids, and certain medications can mitigate arterial stiffness.
• Targeted therapies for isolated systolic hypertension are under investigation.