Doppler flow velocity measurements
Short Communications: Blood Flow Velocity in Microvessels of the Gill Filaments of the Goldfish (Carassius Auratus L )
... Velocity measurements of blood flow in the capillary and vein using a laser Doppler microscope.. Radiological observations on the cardiovascular system in AnguUla anguilla.[r] ...
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Velocity distribution measurements in a fishway like open channel by Laser Doppler Anemometry (LDA)
... Laser Doppler velocimetry (LDV) is a well-proven non-invasive technique which accurately measures velocity of fluid flow at a ...of velocity measurement at a ...resulted Doppler burst ...
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Automated aortic doppler flow tracing for reproducible research and clinical measurements
... analysed Doppler envelopes for LVOT traces which are ...Mitral flow, which is biphasic, would need a more sophisticated algorithm for detection and quantification of Doppler velocity and ...
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Turbulent flow as a cause for underestimating coronary flow reserve measured by Doppler guide wire
... laminar flow conditions we regard intra-coronary Doppler wires as a valid tool for quantification of coronary blood flow at ...blood flow after pharmacological stimulation by papaver- ine or ...
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Quantitative assessment of harmonic power doppler myocardial perfusion imaging with intravenous levovist™ in patients with myocardial infarction: comparison with myocardial viability evaluated by coronary flow reserve and coronary flow pattern of infarct-related artery
... performed Doppler measurements of LAD flow veloc- ity by TTDE within 24 hours after successful recanaliza- ...tion. Doppler echocardiographic examinations were performed with an SONOS 5500 ...
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Measurements of common iliac arterial blood flow in Anurans using Doppler ultrasound
... color Doppler ultrasound machine (Sie- mens Allegra, Erlangen, Germany) with a ...bifurcation. Measurements were tak- en at times when animals were not breath ...successive measurements of max- imum ...
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Immediate Evaluation of Angioplasty and Stenting Results in Supra Aortic Arteries by Use of a Doppler Tipped Guidewire
... intra-arterial Doppler-tipped guidewire system, as compared with duplex Doppler sonography, may indicate that the system is less sub- ject to sonographic interference produced by the ...intra-arterial ...
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Use of a Doppler guide wire for intravascular blood flow measurements: a validation study for potential neurologic endovascular applications
... A calculated volumetric blood flow VBF c was obtained from Doppler guide wire measurements of average peak velocity and vessel internal diameter based on single plane angiography , using[r] ...
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Validity of Doppler Measurements of Anterior Cerebral Artery Blood Flow Velocity: Correlation with Brain Blood Flow in Piglets
... to compare the different indices of blood flow ye- locity obtained from the anterior cerebral arteries (pulsatility index, peak systolic, and end diastolic flow velocity) with total brai[r] ...
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Importance of Angle Correction in the Measurement of Blood Flow Velocity with Transcranial Doppler Sonography
... TCCD measurements were performed (4, 7, 8), and its magnitude suggests that the error in uncorrected velocity values might be larger than previously ...
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In Vitro Evaluation of Intra Aneurysmal, Flow Diverter Induced Thrombus Formation: A Feasibility Study
... recorded. Measurements without the FD were recorded in “single image mode” with a frequency of 100 Hz, and measurements with the FD in dou- ble-image mode with a time difference between the 2 images varied ...
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Acute modulation of endothelial Akt/PKB activity alters nitric oxide–dependent vasomotor activity in vivo
... We also show that dn-Akt gene transfer markedly blocked vasodilation in response to Ach, an endotheli- um-dependent agonist that mobilizes intracellular cal- cium and stimulates NO production (22). In vivo, Ach will ...
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The dynamic field in turbulent round jet discharging into a co flowing stream
... pipe flow [19]. The radial velocity is zero at the nozzle and in the ...radial velocity and the radial gradients of other variables are set to ...co-flow velocity value is ...
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Arterial flow patterns in healthy transitioning near-term neonates
... studied. Doppler morphology and adaptation patterns were distinctly different between the organs (brain, gut and kidney) supporting autonomous vascular regulatory ...organ flow consistently over ...highest ...
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Cranial Ultrasonographic Application in Preterm Baby as a Predictive for White Matter Insult
... CBF measurement in preterm newborns provides useful information about cerebral perfusion and risks for intra ventricular and germinal matrix hemorrhage and for WML (12). In premature neonates, investigators have used a ...
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Hemodynamic evaluation of the right portal vein in healthy dogs of different body weights
... the flow direction in the evaluated vessel was kept less than or equal to 60 degrees in all ...Mean velocity (Vmean) was assessed through the uniform insonation technique by using the software from the ...
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Impaired Dynamic Cerebrovascular Autoregulation in Adolescent Concussion
... & Schmidt, 1945). More specifically, the inert gas method often references the Fick equation which, when applied to a single organ, describes CBF as the ratio of the rate of gas uptake relative to the arterio-venous ...
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Preoperative diastolic function predicts the onset of left ventricular dysfunction following aortic valve replacement in high risk patients with aortic stenosis
... In agreement with other studies, we could easily deter- mine Vp in all patients without post-acquisition manipu- lation and with minimal inter-and intraoperator variability (<5%) [34,36]. Basically, Vp reflects the ...
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Evaluation of turbulent dissipation rate retrievals from Doppler Cloud Radar
... radar Doppler velocity measurements are evaluated using independent, in situ observations in Arctic stratocumulus ...anemometer measurements from a tethered balloon and high frequency pressure ...
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Fetal Doppler versus NST as predictor of adverse perinatal outcome in severe PIH and IUGR
... Results: In the group with abnormal NST but normal velocimetry, there were more women underlying caeserean delivery for fetal distress . Those with normal NST had 50% caeserean rate and 40% required NICU admission, ...
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