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05:41
Non-invasive Assessment of Microvascular and Endothelial Function
Published on: January 29, 2013
The macrocirculation and microcirculation of hypertension
François Feihl1, Lucas Liaudet, Bernard Waeber
1Division de Physiopathologie Clinique, MP-14/204, Centre Hospitalier Universitaire Vaudois, CH-1011 Lausanne, Switzerland.
Current Hypertension Reports
|May 16, 2009
Summary
Hypertension accelerates arterial stiffening, increasing central systolic and pulse pressure. It also causes microvascular remodeling and capillary rarefaction, contributing to end-organ damage in vital organs.
Area of Science:
- Cardiovascular physiology
- Hypertension research
- Vascular biology
Background:
- Hypertension-induced vascular structural changes are key to end-organ damage.
- Interactions between macrovascular and microvascular alterations are critical.
- Understanding these changes is vital for managing hypertensive complications.
Purpose of the Study:
- To review macrovascular and microvascular structural changes in hypertension.
- To examine how hypertension affects arterial biomechanics and stiffness.
- To explore the mechanisms linking vascular changes to end-organ damage.
Main Methods:
- Review of basic concepts in vascular biomechanics (compliance, distensibility, stress-strain).
- Examination of hypertension's impact on conduit artery properties.
- Analysis of microvascular remodeling (arteriolar and capillary) in hypertensive disease.
Main Results:
- Hypertension accelerates age-related arterial stiffening.
- High arterial stiffness increases central systolic and pulse pressure via altered pulse wave velocity and reflections.
- Microvascular changes include inward arteriolar remodeling and capillary rarefaction.
- These microvascular changes are linked to pulsatile pressure transmission in low-resistance vascular beds.
Conclusions:
- Vascular structural changes at both macro and micro levels are central to hypertensive end-organ damage.
- Arterial stiffening significantly impacts central hemodynamics.
- Microvascular remodeling and rarefaction impair organ function in hypertension, particularly in the kidney, heart, and brain.
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