Text of La stiffness vascolare - keycongressi.it · La stiffness vascolare “Le penseur” August Rodin,...
La stiffness vascolareF. Antonini-Canterin (Sacile - Pordenone)
La stiffness vascolare
“Le penseur”August Rodin, 1902
- What?- How?- Why?
1. Arterial stiffness
Stiffness arteriosa: cos’è?
Windkessel model: the arterial system is compared to a fire-hose system.
(more elastic arteries)
Proximal and distal arteries
More elastic Stiffer
The higher the arterial stiffness, the higher the speed of travel of forward and retrograde waves.
Lower PWVLower PP
Higher PWVHigher PP
Propagative model: the arterial system is compared to a tree in winter
Forward wave Backward wave
From arteries to heart…
In young (with elastic arteries) the pulsewave reflection arrives in diastole and thecoronary perfusion is augmented.
In elderly (with stiff arteries) the speedof travel of pulse wave is higher and thereflection wave is premature in latesystole, increasing central PP and SBP;SBP increases the load on the LV, leadingto ventricular hypertrophy and increasedmyocardial oxigen demand.
2. Arterial stiffness
PWV - MRI
A simple echo method to estimate systemic arterial compliance