Results 41 to 50 of about 267,269 (364)
Non-invasive hemodynamic analysis for aortic regurgitation using computational fluid dynamics and deep learning [PDF]
arXiv, 2021 Changes in cardiovascular hemodynamics are closely related to the development of aortic regurgitation, a type of valvular heart disease. Metrics derived from blood flows are used to indicate aortic regurgitation onset and evaluate its severity. These metrics can be non-invasively obtained using four-dimensional (4D) flow magnetic resonance imaging (MRI)
arxiv
Transient cerebral hypoperfusion and hypertensive events during atrial fibrillation: a plausible mechanism for cognitive impairment [PDF]
Scientific Reports, 6: 28635, 2016, 2016 Atrial fibrillation (AF) is associated with an increased risk of dementia and cognitive decline, independent of strokes. Several mechanisms have been proposed to explain this association, but altered cerebral blood flow dynamics during AF has been poorly investigated: in particular, it is unknown how AF influences hemodynamic parameters of the distal ...
arxiv +1 more source
The hemodynamics of counterpulsation
The Journal of Thoracic and Cardiovascular Surgery, 1966 Summary and conclusions 1. Synchronized counterpulsation was applied to two groups of 9 dogs with the use of a new fluid-coupled pulse generator. Multiple measurements were made of central (cardiac) and peripheral hemodynamics. 2. The counterpulsation pump performance was superior to pneumatically coupled systems previously studied.
Enrico Gallo +2 more
openaire +3 more sources
Hemodynamic Monitoring Today [PDF]
Anesthesiology Research and Practice, 2011 Hemodynamic monitoring has been part of the routine management of intensive care patients and high risk surgical patients since the advent of the pulmonary artery catheter (PAC) more than thirty years ago. The growing availability of new less invasive devices over the past decades has now made it possible to monitor cardiac output (CO) more often in ...
Christoph K. Hofer +3 more
openaire +4 more sources
Coronary angiography of the ex‐situ beating donor heart in a portable organ care system
Catheterization and Cardiovascular Interventions, Volume 100, Issue 7, Page 1252-1260, December 1, 2022., 2022 Abstract Objectives To determine safety and feasibility of ex‐situ coronary angiography. Background To cater for the perpetually growing demand for heart donors, interest in donation following circulatory death (DCD) has been rekindled. Further pursuit of donor pool expansion has led to eligibility extension to “marginal” donors who are at higher risk ...
Thomas Meredith +10 more
wiley +1 more source
Photoacoustic vector tomography for deep hemodynamic imaging [PDF]
arXiv, 2022 Non-invasive imaging of deep blood vessels for mapping hemodynamics remains an open quest in biomedical optical imaging. Although pure optical imaging techniques offer rich optical contrast of blood and have been reported to measure blood flow, they are generally limited to surface imaging within the optical diffusion limit of about one millimeter ...
arxiv
Higher ventricular rate during atrial fibrillation relates to increased cerebral hypoperfusions and hypertensive events [PDF]
Scientific Reports, 9: 3779, 2019, 2019 Atrial fibrillation (AF) is associated with cognitive impairment/dementia, independently of clinical cerebrovascular events (stroke/TIA). One of the plausible mechanisms is the occurrence of AF-induced transient critical hemodynamic events; however, it is presently unknown, if ventricular response rate during AF may impact on cerebral hemodynamics.
arxiv +1 more source
Cerebral hemodynamics on MR perfusion images before and after bypass surgery in patients with giant intracranial aneurysms [PDF]
, 2001 Preoperative assessment of the anatomy and dynamics of cerebral circulation for patients with giant intracranial aneurysm can improve both outcome prediction and therapeutic approach.
A. PIERALLINI +8 more
core
Percutaneous pulmonary valve implantation alters electrophysiologic substrate [PDF]
, 2016 BACKGROUND: Percutaneous pulmonary valve implantation (PPVI) is first‐line therapy for some congenital heart disease patients with right ventricular outflow tract dysfunction.
Avari Silva, Jennifer N +5 more
core +2 more sources
Advanced Biology, EarlyView.In this study, the authors show that osteocytes, mechanosensing cells embedded within bone, can indeed regulate prostate cancer cell extravasation through a blood vessel using a physiologically relevant tissue model. Specifically, it is shown that osteocytes modulate the expression of blood vessel cell adhesion molecules, affecting the frequency at ...
Kimberly Seaman +7 more
wiley +1 more source