Does blood pressure variability modulate cardiovascular risk?

Area of Science:

• Cardiovascular Medicine
• Hypertension Research
• Clinical Pharmacology

Background:

• Hypertension is a major risk factor for end-organ damage and vascular events.
• Current clinical guidelines for hypertension diagnosis and treatment primarily focus on mean blood pressure (BP).
• The precise mechanisms by which hypertension leads to organ damage remain incompletely understood.

Purpose of the Study:

• To review evidence on the independent role of BP variability in vascular risk.
• To examine how BP variability influences the effectiveness of antihypertensive medications.
• To inform clinical practice regarding hypertension management.

Main Methods:

• Systematic review of existing literature on blood pressure variability.
• Analysis of studies correlating BP variability with stroke and other vascular events.
• Evaluation of drug-class specific effects on BP variability and clinical outcomes.

Main Results:

• Blood pressure variability independently predicts the risk of stroke and other vascular events, beyond mean BP levels.
• Differences in the effectiveness of various BP-lowering drug classes in preventing stroke are explained by their effects on BP variability.
• Evidence suggests BP variability is a significant, underappreciated factor in cardiovascular risk.

Conclusions:

• Blood pressure variability is a critical determinant of cardiovascular risk in hypertension.
• Clinical guidelines should consider BP variability alongside mean BP for comprehensive hypertension management.
• Targeting BP variability may enhance the efficacy of antihypertensive therapies in stroke prevention.