Zobrazeno 1 - 10
of 375
pro vyhledávání: '"A W Khir"'
Autor:
Wisam S. Hacham, Ashraf W. Khir
Publikováno v:
Heliyon, Vol 10, Iss 11, Pp e31764- (2024)
Models of the arterial network are useful in studying mechanical cardiac assist devices as well as complex pathological states that are difficult to investigate in-vivo otherwise. Earlier work of artificial arterial tree (AAT) have been constructed t
Externí odkaz:
https://doaj.org/article/867b12661d04431ca12ea3350cbe459f
Autor:
Ioana Cretu, Alexander Tindale, Maysam Abbod, Wamadeva Balachandran, Ashraf W. Khir, Hongying Meng
Publikováno v:
International Journal of Cardiology: Heart & Vasculature, Vol 51, Iss , Pp 101382- (2024)
Objective: Our group has shown that central venous pressure (CVP) can optimise atrioventricular (AV) delay in temporary pacing (TP) after cardiac surgery. However, the signal-to-noise ratio (SNR) is influenced both by the methods used to mitigate the
Externí odkaz:
https://doaj.org/article/f95f2654090947ef9260ce611567cd29
Publikováno v:
Experimental Physiology, Vol 108, Iss 9, Pp 1154-1171 (2023)
Abstract Heat and exercise therapies are recommended to improve vascular health across the lifespan. However, the haemodynamic effects of hyperthermia, exercise and their combination are inconsistent in young and elderly people. Here we investigated
Externí odkaz:
https://doaj.org/article/74e0c20a176c46768e6d8e97e60ab5c3
Autor:
Alessandro Giudici, Carlo Palombo, Michaela Kozakova, Carmela Morizzo, J. Kennedy Cruickshank, Ashraf W. Khir
Publikováno v:
Frontiers in Physiology, Vol 12 (2022)
Pulse wave velocity (PWV) is a powerful predictor of cardiovascular events. However, its intrinsic blood pressure (BP)-dependency complicates distinguishing between acute and chronic effects of increased BP on arterial stiffness. Based on the assumpt
Externí odkaz:
https://doaj.org/article/233d5473f2834a808a1d3b53ed9f77b8
Autor:
Alessandro Giudici, Carlo Palombo, Carmela Morizzo, Michaela Kozakova, J. Kennedy Cruickshank, Ian B. Wilkinson, Ashraf W. Khir
Publikováno v:
Physiological Reports, Vol 9, Iss 18, Pp n/a-n/a (2021)
Abstract The estimation of central aortic blood pressure is a cardinal measurement, carrying effective physiological, and prognostic data beyond routine peripheral blood pressure. Transfer function‐based devices effectively estimate aortic systolic
Externí odkaz:
https://doaj.org/article/ad3fbcf4f7144e50b08ac458e4ee0a48
Publikováno v:
Physiological Reports, Vol 9, Iss 15, Pp n/a-n/a (2021)
Abstract Hyperthermia is thought to increase limb blood flow through the activation of thermosensitive mechanisms within the limb vasculature, but the precise vascular locus in which hyperthermia modulates perfusion remains elusive. We tested the hyp
Externí odkaz:
https://doaj.org/article/01685ee6507544a08238565ee133ded7
Autor:
Sana Suri, Daniel Bulte, Scott T. Chiesa, Klaus P. Ebmeier, Peter Jezzard, Sebastian W. Rieger, Jemma E. Pitt, Ludovica Griffanti, Thomas W. Okell, Martin Craig, Michael A. Chappell, Nicholas P. Blockley, Mika Kivimäki, Archana Singh-Manoux, Ashraf W. Khir, Alun D. Hughes, John E. Deanfield, Daria E. A. Jensen, Sebastian F. Green, Veronika Sigutova, Michelle G. Jansen, Enikő Zsoldos, Clare E. Mackay
Publikováno v:
Frontiers in Physiology, Vol 12 (2021)
BackgroundIt is well-established that what is good for the heart is good for the brain. Vascular factors such as hypertension, diabetes, and high cholesterol, and genetic factors such as the apolipoprotein E4 allele increase the risk of developing bo
Externí odkaz:
https://doaj.org/article/fd6cdf6493f34421b7162fca5d4a66a0
P.04 A Transfer-Function-Free Technique for the Non-Invasive Estimation of Central Arterial Pressure
Publikováno v:
Artery Research, Vol 26, Iss Supplement 1 (2020)
Background: Central aortic pressure (CAP) is important for the determination of the cardiovascular risk. Transfer function (TF)-based techniques allow for estimating CAP non-invasively from pressure waveforms acquired distally in the circulation. How
Externí odkaz:
https://doaj.org/article/90ca8b15e8e446d480a25b3430016bc8
Autor:
Shima Abdullateef, Ashraf W. Khir
Publikováno v:
Artery Research, Vol 26, Iss Supplement 1 (2020)
Background: Wave reflections play a major role in changing the shape of the pressure waveform. Reflections measured at the aortic root (AR) are thought to be due to the tapering of the aorta [1] and multiple reflection sites, however, there is no con
Externí odkaz:
https://doaj.org/article/fb639b69a26d419d85e70f758e84796e
Publikováno v:
Frontiers in Physiology, Vol 11 (2020)
Increased wave reflection is an independent predictor of cardiovascular events, possibly due to effects on left ventricular (LV) function. We investigated the relationship between reflected waves in early systole, the forward decompression wave in mi
Externí odkaz:
https://doaj.org/article/9671a610716f46eca1c6924e0596e942