Paper Info
Title
Wave speed and intensity in the canine aorta: analysis with and without the Windkessel-wave system.
Abstract
The Windkessel model, coupled with the wave propagation theory, was applied to data measured in the ascending aorta of 11 anaesthetised dogs during total aortic occlusion at the thoracic and diaphragm levels. Wave speed and wave intensity were calculated using the measured pressure (P) and velocity (U), and separately using the pressure due to the wave (P(ex)) and U in the aorta approximately 1 cm distal to the aortic valve. Results show that wave speed, determined using the PU-loop method, is higher during thoracic than in diaphragm occlusion (p<0.001). On average wave speed calculated using P (c) is higher than that determined using P(ex) (c(WK)) in both occlusion sites (p<0.001). During aortic occlusion at the thoracic level, the intensity of backward waves was almost negligible using the Windkessel-wave system. Backward waves were observed during the occlusion at the diaphragm level, but their magnitude is lower compared to that determined with P. The Windkessel-wave system seems to reduce the magnitude of reflected waves during total aorta occlusion, notably if the occlusion sites are close to the ascending aorta.
Year
DOI
Venue
2011
10.1109/IEMBS.2011.6090040
EMBC
Keywords
Field
DocType
mathematical model,reservoirs,pressure measurement,physiology,wave propagation,propagation
Intensity (physics),Diaphragm (structural system),Ventricular pressure,Aortic valve stenosis,Occlusion,Internal medicine,Computer science,Cardiology,Aortic valve,Ascending aorta,Aorta
Conference
Volume
ISSN
ISBN
2011
1557-170X
978-1-4244-4122-8
Citations 
PageRank 
References 
0
0.34
1
Authors
2
Name
Order
Citations
PageRank
Alessandra Borlotti101.35
Ashraf Khir202.37