Orthostatic Blood Pressure, Cardiovascular Disease, and Hypotensive Events

Area of Science:

• Cardiovascular Medicine
• Gerontology
• Public Health

Background:

• Orthostatic hypotension is a condition characterized by a drop in blood pressure (BP) upon standing.
• It is associated with adverse health outcomes including coronary heart disease, falls, and syncope.

Purpose of the Study:

• To investigate the association between various blood pressure parameters, including supine and standing BP and orthostatic changes, with cardiovascular events, falls, and syncope.
• To evaluate these associations in strata of antihypertensive treatment.

Main Methods:

• The Atherosclerosis Risk in Communities (ARIC) study followed 11,386 adult participants (aged 45-64) for over 35 years.
• Supine and standing BP were measured at baseline. Associations with adjudicated coronary heart disease, mortality, falls, and syncope were assessed using Cox models, stratified by antihypertensive treatment.

Main Results:

• Drops in systolic BP upon standing were linked to coronary heart disease, syncope, and mortality.
• Higher supine systolic BP and mean arterial pressure were associated with syncope in untreated individuals.
• Increased systolic BP upon standing (≥20 mm Hg) was associated with falls and syncope, especially in untreated participants. Lower standing systolic BP was linked to syncope in treated individuals.

Conclusions:

• Elevated BP, not solely low standing BP, may be a significant risk factor for both cardiovascular and hypotension-related events.
• This association is particularly pronounced in untreated adults.