Results 111 to 120 of about 782,046 (314)

Quantification of the cerebral pressure–flow relationship directional sensitivity: Reliability of shorter repeated squat–stand durations

Experimental Physiology, EarlyView.
Abstract The magnitude of changes in middle cerebral artery mean blood velocity (MCAv) is attenuated when mean arterial pressure (MAP) increases compared with when MAP decreases. This directional sensitivity has been characterized using a time‐corrected ratio calculated on MCAv and MAP changes induced by repeated squat–stands (RSS) at 0.05 and 0.10 Hz ...
Lawrence Labrecque, Marc‐Antoine Roy, Shahrzad Soleimani Dehnavi, Mahmoudreza Taghizadeh, Joel S. Burma, Jonathan D. Smirl, Patrice Brassard   +6 more
wiley   +1 more source

Effects of Hypobaric Hypoxia on Cerebral Autoregulation [PDF]

Stroke, 2010
Background and Purpose— Acute hypoxia is associated with impairment of cerebral autoregulation (CA), but it is unclear if altered CA during prolonged hypoxia is pivotal to the development of cerebral pathology, such as that seen in acute mountain sickness (AMS).
Subudhi, AW, Panerai, RB, Roach, RC
openaire   +4 more sources

Steady‐state cerebral blood flow and dynamic cerebral autoregulation during neck flexion and extension in seated healthy young adults

Physiological Reports, 2023
Neck flexion and extension show differences in various physiological factors, such as sympathetic nerve activity and intracranial pressure (ICP). We hypothesized that differences would exist in steady‐state cerebral blood flow and dynamic cerebral ...
Tomokazu Kato, Toru Konishi, Takuya Kurazumi, Yojiro Ogawa, Ken‐ichi Iwasaki   +4 more
doaj   +1 more source

Fractal Rigidity in Migraine [PDF]

, 2003
We study the middle cerebral artery blood flow velocity (MCAfv) in humans using transcranial Doppler ultrasonography (TCD). Scaling properties of time series of the axial flow velocity averaged over a cardiac beat interval may be characterized by two ...
Glaubic-Latka, Marta, Latka, Dariusz, Latka, Miroslaw, West, Bruce J.   +3 more
core   +2 more sources

Monitoring of Cerebral Blood Flow Autoregulation after Cardiac Arrest

Medicina
Background: Cardiac arrest remains one of the leading causes of death. After successful resuscitation of patients in cardiac arrest, post-cardiac arrest syndrome develops, part of it being an impaired cerebral blood flow autoregulation.
Rok Petrovčič, Martin Rakusa, Andrej Markota   +2 more
doaj   +1 more source

Cerebral Autoregulation in Sick Infants:Current Insights [PDF]

, 2020
Cerebrovascular autoregulation is the ability to maintain stable cerebral blood flow within a range of cerebral perfusion pressures. When cerebral perfusion pressure is outside the limits of effective autoregulation, the brain is subjected to ...
Kooi, Elisabeth M. W., Richter, Anne E.
core   +1 more source

Individuals with persisting post‐concussion symptoms with physiological subtype demonstrate altered cardiovascular and autonomic responses to face cooling

Experimental Physiology, EarlyView.
Abstract Individuals with persisting post‐concussion symptoms with physiological subtype (PPCS‐P) demonstrate exercise intolerance due to exacerbation of concussion‐like symptoms during incremental exercise. We tested the hypothesis that individuals with PPCS‐P (n = 12) would have a blunted cardiac autonomic response to face cooling compared to healthy
Phillip J. Wallace, Steve Lidstone, Josh G. Nowlan, Johnathan Ljubanovich, Brandon J. McKinlay, Stephen A. Klassen, Stephen S. Cheung   +6 more
wiley   +1 more source

Aortic and cardiovascular remodelling after thoracic endovascular aortic repair for blunt traumatic aortic injury in younger patients: A narrative review of physiological and clinical outcomes

Experimental Physiology, EarlyView.
Abstract Blunt traumatic aortic injury (BTAI) is severe, often fatal in younger populations due to high‐energy deceleration mechanisms. Thoracic endovascular aortic repair (TEVAR) has revolutionised BTAI treatment, surpassing the previously standard open surgical repair in mortality and complication rates.
Marco David Bokobza De la Rosa, Matti Jubouri, Thurkga Moothathamby, Mohamed Refaie, Ali Murtada, Idhrees Mohammed, Ian M. Williams, Damian M. Bailey, Mohamad Bashir   +8 more
wiley   +1 more source

Cerebral Autoregulation Real-Time Monitoring

PLOS ONE, 2016
Cerebral autoregulation is a mechanism which maintains constant cerebral blood flow (CBF) despite changes in mean arterial pressure (MAP). Assessing whether this mechanism is intact or impaired and determining its boundaries is important in many clinical settings, where primary or secondary injuries to the brain may occur.
Eliahu Ratner, Stas Lokshin, Adi Tsalach, Ilan Breskin, Zmira Silman, Nahum Budin, Moshe Kamar   +6 more
openaire   +5 more sources

The best marker for guiding the clinical management of patients with raised intracranial pressure: the RAP index or the mean pulse amplitude? [PDF]

, 2016
Raised intracranial pressure is a common problem in a variety of neurosurgical conditions including traumatic brain injury, hydrocephalus and intracranial haemorrhage.
Hall, Allan, O'Kane, Roddy
core   +2 more sources