Results 71 to 80 of about 14,398 (231)

Predictive value of transcranial doppler ultrasound for cerebral small vessel disease in elderly patients

Arquivos de Neuro-Psiquiatria
Objective: To investigate the predictive value of transcranial Doppler (TCD) ultrasound for cerebral small vessel disease in elderly patients. Methods: Transcranial Doppler ultrasound and magnetic resonance imaging (MRI) were performed on 184 elderly ...
Shengqi Fu, Jiewen Zhang, Hongtao Zhang, Shuling Zhang   +3 more
doaj   +1 more source

An Optimized Multi‐Stage Drainage Cannula Design for Venoarterial Extracorporeal Membrane Oxygenation

Artificial Organs, EarlyView.
This study utilized an extensive optimization involving n = 540 design of experiments to produce a superior drainage cannula design. Compared to the clinically used Maquet model, our optimized design demonstrated reduced blood stagnation volumes, increased cannula tip velocities, and higher upper body drainage, potentially minimizing risk of thrombosis
Avishka Wickramarachchi, Mehrdad Khamooshi, Aidan Burrell, Shaun D. Gregory   +3 more
wiley   +1 more source

Informativity of pulsatility index and cerebral autoregulation in hydrocephalus

Perspectives in Medicine, 2012
SummaryBackgroundA high correlation between transcranial Doppler pulsatility index (PI) increase and intracranial hypertension has been recently demonstrated in most neurosurgical patients. But in patients with hydrocephalus PI is sometimes controversial.
Semenyutin, Vladimir, Aliev, Vugar, Bersnev, Valery, Patzak, Andreas, Rozhchenko, Larisa, Kozlov, Alexandr, Ramazanov, Shakhob   +6 more
openaire   +1 more source

Phase coupling between eye and brain pulsations is bidirectional and modulated by the parasympathetic system – An fMREye study

Acta Ophthalmologica, EarlyView.
Abstract Purpose Physiological pulsations driven by cardiac, respiratory, and vasomotor activity are essential for solute transport within perivascular and perineural cerebrospinal fluid (CSF) pathways that support brain and eye clearance systems. Previous studies have shown that parasympathetic blockade significantly reduces ocular pulsation power and
Ebrahimi Seyed‐Mohsen, Väyrynen Tommi, Huotari Niko, Saarela Ville, Honkamo Marja, Helakari Heta, Järvelä Matti, Korhonen Vesa, Raitamaa Lauri, Kiviniemi Vesa   +9 more
wiley   +1 more source

Fetal Femoral Artery Doppler Evaluation in Late-Onset Fetal Growth Restriction: A Case-Control Study

Hitit Medical Journal
Objective: To compare the femoral artery and other ultrasonographic Doppler measurements between fetuses with late-onset fetal growth restriction and uncomplicated fetuses.
Atakan Tanacan, Bedri Sakcak, Ramazan Denizli, Zahid Ağaoğlu, Özgür Kara, Dilek Sahin, Nihat Farisoğulları   +6 more
doaj   +1 more source

Inter‐eye microvascular asymmetry across stages of diabetic retinopathy: An OCT angiography study

Acta Ophthalmologica, EarlyView.
Abstract Purpose To evaluate inter‐eye asymmetry in macular microvascular parameters across different stages of diabetic retinopathy (DR) using OCT angiography, and to explore the associations with clinical factors. Methods This cross sectional study included 442 eyes of 221 patients with diabetes mellitus type 2. Central subfield thickness (CST), area
Stela Vujosevic, Sema Tamer Kaderli, Gabriele Piccoli, Elena Tagliabue, Camilla Alovisi, Vanda Bucceri, Emanuele Torti, Elisa Marenzi, Dogukan Ozen, Livio Luzi, Paolo Nucci   +10 more
wiley   +1 more source

P87 CEREBROVASCULAR REACTIVITY DURING COGNITIVE ACTIVATION IN ADULTS WITH CONTROLLED HYPERTENSION

Artery Research, 2018
Hypertension, even when pharmaceutically controlled, may accelerate arterial stiffening and impair changes in blood flow necessary to support neural activity (neurovascular coupling [NVC]).
Wesley Lefferts, Jacob DeBlois, Tiago Barreira, Kevin Heffernan   +3 more
doaj   +1 more source

Wasteosomes accumulate in periventricular white matter hyperintensities and exhibit complex relationships with mixed pathology, sclerotic index, and perivascular space

Brain Pathology, EarlyView.
In a mixed diagnostic cohort of pathologically diagnosed Alzheimer's disease, cerebrovascular disease, mixed pathology, and control tissue, we connected the histopathological wasteosome profile in periventricular (PV) brain sections to 7T FLAIR‐MRI confirmed PV white matter hyperintensities (WMHs), vascular stenosis and perivascular space size ...
Nikita Ollen‐Bittle, Isabella Boesgaard, Austyn Roseborough, Meaghan Frank, Qi Zhang, Stephen H. Pasternak, Robert Hammond, Shawn N. Whitehead   +7 more
wiley   +1 more source

Pulsatility Index [PDF]

Neurosurgical Focus, 2001
openaire   +2 more sources

Comparison of Pulsatility Index and Notching of Uterine Artery Doppler on Normotensive Pregnancy and Established Pre-eclampsia

Indonesian Journal of Obstetrics and Gynecology
Objective: The aim was to assess pulsatility index of uterine artery (Ut-A PI) of normotensive pregnancy and preeclampsia between 28-40 weeks of gestation.   Methods: This cross-sectional study was conducted at Dr.
Muhammad Wahyu Utomo, Detty Siti Nurdiati, Irwan Taufiqur Rachman, Raden Aditya Kusuma   +3 more
doaj   +1 more source