Search results for " cerebral blood flow"

showing 4 items of 4 documents

Exploring metrics for the characterization of the cerebral autoregulation during head-up tilt and propofol general anesthesia

2022

Techniques grounded on the simultaneous utilization of Tiecks' second order differential equations and spontaneous variability of mean arterial pressure (MAP) and mean cerebral blood flow velocity (MCBFV), recorded from middle cerebral arteries through a transcranial Doppler device, provide a characterization of cerebral autoregulation (CA) via the autoregulation index (ARI). These methods exploit two metrics for comparing the measured MCBFV series with the version predicted by Tiecks' model: normalized mean square prediction error (NMSPE) and normalized correlation rho. The aim of this study is to assess the two metrics for ARI computation in 13 healthy subjects (age: 27 & PLUSMN; 8 yr…

AdultMaleUltrasonography Doppler TranscranialEndocrine and Autonomic SystemsAutoregulation indexBlood PressureSpontaneous variability; Cerebral blood flow; Mean arterial pressure; Cardiovascular control; Autoregulation index; Autonomic nervous systemAnesthesia GeneralMiddle AgedCerebral blood flowMean arterial pressureYoung AdultCellular and Molecular NeuroscienceCerebrovascular CirculationCardiovascular controlSettore ING-INF/06 - Bioingegneria Elettronica e InformaticaHomeostasisHumansAutonomic nervous systemNeurology (clinical)PropofolBlood Flow VelocitySpontaneous variabilityAged
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Dynamic cerebrovascular autoregulation in patients prone to postural syncope: Comparison of techniques assessing the autoregulation index from sponta…

2021

Abstract Three approaches to the assessment of cerebrovascular autoregulation (CA) via the computation of the autoregulation index (ARI) from spontaneous variability of mean arterial pressure (MAP) and mean cerebral blood flow velocity (MCBFV) were applied: 1) a time domain method (TDM); 2) a nonparametric method (nonPM); 3) a parametric method (PM). Performances were tested over matched and surrogate unmatched pairs. Data were analyzed at supine resting (REST) and during the early phase of 60° head-up tilt (TILT) in 13 subjects with previous history of postural syncope (SYNC, age: 28 ± 9 yrs.; 5 males) and 13 control individuals (noSYNC, age: 27 ± 8 yrs.; 5 males). Analysis was completed b…

AdultMalemedicine.medical_specialtyMean arterial pressureSupine positionBlood PressureSyncopeCellular and Molecular NeuroscienceOrthostatic vital signsYoung AdultInternal medicinemedicineHeart rate variabilityHomeostasisHumansAutonomic nervous systemAutoregulationMean cerebral blood flow velocityHeart rate variabilityArterial pressureEndocrine and Autonomic Systemsbusiness.industryHead-up tiltAutonomic nervous systemBlood pressureCerebral blood flowCerebrovascular CirculationCardiovascular controlCardiologyNeurology (clinical)businessBlood Flow Velocity
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Cetacea Cephalica. Circolazione encefalica,densità neuronale e sviluppo cranico nei delfini.

2008

Dolphins cerebral blood flow neuronal density.Settore VET/01 - Anatomia Degli Animali Domestici
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Update on mechanism and therapeutic implications of spinal cord stimulation and cerebral hemodynamics: A narrative review

2017

Spinal cord stimulation (SCS) is well known for its early role in the management of chronic pain, mainly failed back surgery syndrome (FBSS), spasticity, and bowel and bladder dysfunction. In more recent years, SCS has been proposed for patients suffering from refractory angina or peripheral vasculopathies in order to gain symptom relief, thus indicating some hemodynamic effect on the peripheral circulation. Taking into account this scientific observation, since the late1980s, researchers have started to investigate the potential effect of SCS on cerebral blood flow (CBF) regulation and its possible application in certain pathological settings dealing with vascular pattern dysfunction, such…

Subarachnoid hemorrhage030204 cardiovascular system & hematologyCerebral autoregulationBrain IschemiaBrain ischemia03 medical and health sciences0302 clinical medicineAnimalsHomeostasisHumansVasospasm IntracranialMedicineSpasticitySympathectomyBrain injuryStrokeBrain Neoplasmsbusiness.industrySettore MED/27 - NeurochirurgiaBrain injury; Cerebral autoregulation; Cerebral blood flow; Functional sympathectomy; Spinal cord stimulation; Stroke; Vasospasm; Surgery; Neurology (clinical)HemodynamicsChronic painVasospasmFunctional sympathectomySubarachnoid HemorrhageCerebral blood flowmedicine.diseaseVasospasmCerebral autoregulationStrokenervous systemCerebral blood flowSpinal cord stimulationBrain InjuriesCerebrovascular CirculationAnesthesiaSurgeryNeurology (clinical)medicine.symptombusiness030217 neurology & neurosurgery
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