Results 371 to 380 of about 10,888,759 (408)
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Archives of General Psychiatry, 1986
To evaluate dorsolateral prefrontal cortex (DLPFC) physiology and function simultaneously, 20 medication-free patients with chronic schizophrenia and 25 normal controls underwent three separate xenon Xe 133 inhalation procedures for determination of ...
D. Weinberger, K. Berman, R. Zec
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To evaluate dorsolateral prefrontal cortex (DLPFC) physiology and function simultaneously, 20 medication-free patients with chronic schizophrenia and 25 normal controls underwent three separate xenon Xe 133 inhalation procedures for determination of ...
D. Weinberger, K. Berman, R. Zec
semanticscholar +1 more source
European Radiology, 2001
Traditionally, Doppler ultrasound has been used to estimate blood flow as the mean velocity multiplied by the vessel area, but this is subject to significant errors and may be difficult to perform accurately. Microbubbles, developed as contrast agents for ultrasound, were initially envisaged as useful for increasing the intensity of echoes and thus ...
Martin J. K. Blomley +3 more
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Traditionally, Doppler ultrasound has been used to estimate blood flow as the mean velocity multiplied by the vessel area, but this is subject to significant errors and may be difficult to perform accurately. Microbubbles, developed as contrast agents for ultrasound, were initially envisaged as useful for increasing the intensity of echoes and thus ...
Martin J. K. Blomley +3 more
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The Bulletin of Mathematical Biophysics, 1967
The rigidity of the skull and the inertial characteristics and incompressibility of its contents cause the elastic cerebral arteries and veins to act over brief periods of time like rigid tubes of relatively small diameter. Poiseuille's law is applicable to their behavior.
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The rigidity of the skull and the inertial characteristics and incompressibility of its contents cause the elastic cerebral arteries and veins to act over brief periods of time like rigid tubes of relatively small diameter. Poiseuille's law is applicable to their behavior.
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New England Journal of Medicine, 1966
TWENTY years ago Drs. Seymour Kety and Carl Schmidt first described the inert-gas technic for the quantitative measurement of cerebral blood flow.
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TWENTY years ago Drs. Seymour Kety and Carl Schmidt first described the inert-gas technic for the quantitative measurement of cerebral blood flow.
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Journal of Biomechanics, 1979
Abstract Pulmonary hemodynamics is studied in terms of the quasi one-dimensional unsteady nonlinear fluid flow equations which are applied to the 40-odd generations of branched arterial, capillary and venous distensible vessel segments making up the four lobes of the complete lung.
J.A. Maccario, R. Collins
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Abstract Pulmonary hemodynamics is studied in terms of the quasi one-dimensional unsteady nonlinear fluid flow equations which are applied to the 40-odd generations of branched arterial, capillary and venous distensible vessel segments making up the four lobes of the complete lung.
J.A. Maccario, R. Collins
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, 2017
The cardiovascular system transports gases (oxygen and carbon dioxide), nutrients, enzymes, hormones, and heat between the respiratory, digestive, endocrine, and excretory systems and the cells of the body.
Alberto Figueroa +2 more
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The cardiovascular system transports gases (oxygen and carbon dioxide), nutrients, enzymes, hormones, and heat between the respiratory, digestive, endocrine, and excretory systems and the cells of the body.
Alberto Figueroa +2 more
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Microvascular blood flow is altered in patients with sepsis.
American Journal of Respiratory and Critical Care Medicine, 2002Microvascular blood flow alterations are frequent in animal models of sepsis and may impair tissue oxygenation. We hypothesized that alterations of the microcirculation are present in patients with sepsis.
D. De Backer +4 more
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Pediatrics, 1984
To the Editor.— Hansen and co-workers1 have taken the time to address a question of considerable import, ie, whether the use of Doppler continuous wave forms provides a means of reflecting changes in brain blood flow when the anterior cerebral artery is used.
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To the Editor.— Hansen and co-workers1 have taken the time to address a question of considerable import, ie, whether the use of Doppler continuous wave forms provides a means of reflecting changes in brain blood flow when the anterior cerebral artery is used.
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Archives of Ophthalmology, 1979
In ophthalmology, laser-Doppler velocimetry (LDV) has been used for various types of measurements besides those of blood velocity. For example, it has been applied to investigate eye motion during smooth pursuit of a target [1] and the mechanical compliance of the optic nerve head [2].
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In ophthalmology, laser-Doppler velocimetry (LDV) has been used for various types of measurements besides those of blood velocity. For example, it has been applied to investigate eye motion during smooth pursuit of a target [1] and the mechanical compliance of the optic nerve head [2].
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New England Journal of Medicine, 1972
Hence does arise the action and function of the heart, which by pulsation it performs. [William Harvey, De Motu Cordis, 1628.] THE study of blood flow as a pulsatile phenomenon is scarcely new, but it has gained new impetus from three recent developments: the commercial production of reliable blood flowmeters, the formulation of theories appropriate to
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Hence does arise the action and function of the heart, which by pulsation it performs. [William Harvey, De Motu Cordis, 1628.] THE study of blood flow as a pulsatile phenomenon is scarcely new, but it has gained new impetus from three recent developments: the commercial production of reliable blood flowmeters, the formulation of theories appropriate to
openaire +3 more sources