Results 221 to 230 of about 45,635 (265)
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The Physiologic Importance of Pulsatile Blood Flow
New England Journal of Medicine, 1962NOT since the time of Hippocrates has the diagnostic value of the arterial pulse been disputed. Yet its role in physiology is considered of little, if any, consequence. Typical of this attitude was Wesolowski's1 statement that "the presence of the pulse may represent nothing more in physiological terms than an expression of the limitations of the ...
H, Wilkens +2 more
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Physiology of Coronary Blood Flow
2015Coronary blood flow is responsible for providing nutrients and oxygen to the heart thus enabling it to pump blood to itself and the rest of the circulatory system. Given this important task, oxygen supply must be matched very closely to the demands of the myocardium.
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Transmural Flow During Physiological Vasodilation
1984It is well established that coronary blood flow is influenced by 1) metabolic activity of the myocardium and 2) by mechanical forces generated by contracting cardiac muscle. Of course, these factors are interrelated. Usually they are positively correlated with increases in cardiac function associated with increases in myocardial metabolism and with ...
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Flow Cytometric Measurement of Different Physiological Parameters
2018A variety of physiological parameters involved in signal transduction pathways, enzymatic activities, ATP production, and many other physiological processes can be analyzed by flow cytometry. Parameters as intracellular pH, membrane potential, calcium concentration, reactive oxygen species (ROS) generation, or glutathione content can be estimated ...
Araniti F. +2 more
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An Electromechanical Flow Transducer for Physiological Fluids
Physics in Medicine & Biology, 1966A simple method, based on conductivity measurement, has been developed to obtain an electrical output from a rotameter flowmeter. The ancillary equipment required is relatively simple and inexpensive. The reproducibility of readings throughout the day is generally better than ±2% and never worse than ±5%.
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Physiology of Cerebral Blood Flow
Abstract Cerebral blood flow (CBF) is tightly regulated regionally via multiple processes including the neurovascular unit which consists of perivascular nerves, endothelium, and astrocytes working together to regulate CBF, autoregulation which allows the brain to maintain a constant CBF despite changes in blood pressure, flow metabolismOssama Khazaal, W. Andrew Kofke
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Cerebral Blood Flow Physiology and Monitoring
2004For optimal therapy of patients with brain injury, a thorough knowledge of the underlying cerebral blood flow (CBF) physiology is essential. This chapter reviews the relationship between CBF and brain metabolism and summarizes the therapeutic implications of this interaction in patients with brain injury.
Michel T. Torbey, Anish Bhardwaj
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Physiologic Lesion Assessment: Fractional Flow Reserve
2018Patient outcome following percutaneous coronary intervention (PCI) is predominantly determined by three factors: clinical presentation, comorbidities, and decision-making process before, during, and after the PCI procedure. In order to justify any intervention, there needs to be reason to think that this will result in either (a) an improvement of ...
Mohammad Sahebjalal, Nicholas Curzen
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Physiology and Pathophysiology of Arterial Flow
2014Arterial flow is a three-dimensional unsteady process that is analyzed by measurements as well as physiological, biological, and mechanical experiments and numerical simulations. Few quantities can be noninvasively measured; they encompass cardiac frequency and peripheral arterial blood pressure as well as velocity and flow rate in given arterial ...
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