Editorial: increased cardiac output in cirrhosis - non-invasive assessment of regional blood flow by magnetic resonance angiography

2016 ◽  
Vol 43 (12) ◽  
pp. 1340-1342 ◽  
Author(s):  
A. Berzigotti ◽  
J. Bosch
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Regional Blood Flow ◽  
Non Invasive

scholarly journals 110 Patient-Specific Cerebral Regional Blood Flow Model Using Quantitative Magnetic Resonance Angiography to Predict Stump Pressure

Neurosurgery ◽  
2018 ◽  
Vol 65 (CN_suppl_1) ◽  
pp. 83-84
Author(s):  
Daniel Li ◽  
Meide Zhao ◽  
Sepideh Amin-Hanjani ◽  
Robert Kufahl ◽  
Xinjian Du ◽  
...  
Keyword(s):  
Blood Flow ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Flow Model ◽  
Regional Blood Flow ◽  
Patient Specific ◽  
Quantitative Magnetic Resonance ◽  
Stump Pressure ◽  
Blood Flow Model

scholarly journals Perfusion magnetic resonance neuroimaging

2019 ◽  
Author(s):  
Adnan Šehić ◽  
Fuad Julardžija ◽  
Merim Jusufbegović ◽  
Deniz Bulja ◽  
Hadžan Konjo ◽  
...  
Keyword(s):  
Blood Flow ◽  
Magnetic Resonance ◽  
Acute Stroke ◽  
Cerebral Perfusion ◽  
Technology Development ◽  
Regional Blood Flow ◽  
Mr Perfusion ◽  
Endovascular Recanalization

The clinical appliance of perfusion is being continuously developed and it is closely related to technology development. The role of perfusion neuroimaging in the management of acute stroke has been to prove reduced regional blood flow and to give the contribution in the identification of ischemic areas, respectively the regions of hypoperfusion that can be treated by thrombolytic and/or endovascular recanalization therapy. There are two main approaches to the measurement of cerebral perfusion by magnetic resonance. The aim of this article is to compare different measuring approaches of MR perfusion neuroimaging.

1154 AGE-RELATED CHANGES IN MUSCLE BLOOD FLOW BY MAGNETIC RESONANCE ANGIOGRAPHY

1993 ◽  
Vol 25 (Supplement) ◽  
pp. S162
Author(s):  
J. M. Foley ◽  
R. A. Meyer ◽  
S. J. Harkema ◽  
E. J. Potchen
Keyword(s):  
Blood Flow ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Muscle Blood Flow ◽  
Age Related ◽  
Age Related Changes

Abstract WP432: Non-invasive Respiratory Impedance Enhances Cerebral Perfusion

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
Christopher G Favilla ◽  
Ashwin B Parthasarathy ◽  
John A Detre ◽  
Michael T Mullen ◽  
Scott E Kasner ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Flow Velocity ◽  
Cerebral Perfusion ◽  
Respiratory Impedance ◽  
Mean Flow ◽  
Non Invasive ◽  
End Tidal ◽  
High Level ◽  
Mean Flow Velocity

Background: Optimization of cerebral blood flow is the cornerstone of clinical management in a number of neurologic diseases, most notably ischemic stroke. Intra-thoracic pressure influences cardiac output and has the potential to impact cerebral blood flow (CBF). Here we aim to quantify cerebral hemodynamic changes in response to increased respiratory impedance using a non-invasive respiratory device. Methods: Cerebral perfusion was measured under varying levels of respiratory impedance (6cm H 2 0, 9cm H 2 0, and 12 cm H 2 0) in 20 healthy volunteers. Simultaneous measurements of microvascular CBF and middle cerebral artery mean flow velocity (MFV), respectively, were performed with optical diffuse correlation spectroscopy (DCS) and transcranial Doppler ultrasound (TCD). Results: At the high level of respiratory impedance, mean flow velocity increased by 6.4% compared to baseline (p=0.004), but changes in cortical CBF were smaller and non-significant (Figure). Heart rate, cardiac output, respiratory rate, and end tidal CO 2 remained stable during all levels of respiratory impedance. There was small increase in mean arterial blood pressure, 1.7% (p=0.006), at the high level of respiratory impedance. In a multivariable linear regression model accounting for end tidal CO 2 and individual variability, respiratory impedance was associated with increases in both mean flow velocity (coefficient: 0.49, p<0.001) and cortical CBF (coefficient: 0.13, p<0.001). Conclusions: Manipulating intrathoracic pressure via non-invasive respiratory impedance was well tolerated and produced a small but measurable increase in cerebral perfusion in healthy individuals. Future studies in acute ischemic stroke patients with impaired cerebral autoregulation is warranted in order to assess whether respiratory impedance is feasible as a novel non-invasive therapy for stroke.

Cardiac output and regional blood flow in hypoxic woodchucks

1971 ◽  
Vol 220 (6) ◽  
pp. 1565-1568 ◽  
Author(s):  
RF Burlington ◽  
JA Vogel ◽  
TM Burton ◽  
IA Salkovitz
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Regional Blood Flow
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