Aortic Flow Measurement
Aortic Flow Measurement - Related Videos
10:05
Measuring Turbulent Flows
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI Turbulent flows exhibit very high frequency fluctuations that require instruments with high time-resolution for their appropriate characterization. Hot-wire anemometers have a short enough time-response to fulfill this requirement. The purpose of this experiment is to demonstrate the use of hot-wire anemometry to characterize a turbulent jet. In this...
12:17
Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Cited by 4 •
2017
Full-root aortic valve replacement by stentless aortic xenograft is a viable option in patients with small aortic roots. We describe, a technique for the full-root implantation of stentless aortic xenografts, with emphasis on the management of the proximal suture line and coronary anastomoses, and discuss its limitations and alternative options.
02:52
Calcification Assay to Measure Calcium Concentration in Aortic Valve Interstitial Cells
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2025
This video demonstrates an assay technique for assessing the calcification of the aortic valve interstitial cells in vitro. The assay helps to quantify the calcium concentration using the arsenazo III reagent, a calcium-sensitive dye that reacts with calcium ions to form a purple-colored calcium-arsenazo complex.
09:12
Aortic Ring Assay
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Cited by 42 •
2009
Angiogenesis, the sprouting of blood vessels from pre-existing vasculature, is associated with both natural and pathological processes. Here we demonstrate an aortic ring assay that allows angiogenic potentiators and inhibitors to be directly added to aortic rings in culture. Sprouting and neovessel outgrowth can be determined by inspecting the aortic rings over a period of 6-12 days.
13:35
Mass Conservation and Flow Rate Measurements
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The purpose of this experiment is to demonstrate the calibration of a flow passage as a flowmeter using a control volume (CV) formulation [1, 2]. The CV analysis focuses on the macroscopic effect of flow on engineering systems, rather than the detailed description that could be achieved with a detailed differential analysis. These two techniques should be...
FAQs
Doppler echocardiography detects frequency shifts in ultrasound waves reflected from moving blood. The direction and magnitude of that shift provide information about blood velocity, while the geometry of the aortic vessel helps relate velocity to flow through the vessel. This combination allows clinicians to connect the measured signal with cardiac output and assess ventricular performance in cardiovascular evaluation.
Phase-contrast magnetic resonance imaging uses a different measurement principle: it encodes blood-flow velocity directly within images. Compared with Doppler echocardiography, it obtains velocity information through magnetic-resonance image encoding rather than reflected ultrasound frequency shifts. The distinction gives researchers and clinicians two modality-specific ways to investigate aortic flow, depending on the cardiovascular question and imaging context.
Flow interpretation requires both velocity and vessel geometry, rather than velocity as an isolated value. Geometry supplies the vessel-related context needed to interpret how blood movement relates to flow through the aorta. This is especially important when measurements are used to examine vascular function or compare circulatory changes, because the result depends on the interaction of these two assessed features.
Because blood leaves the heart through the aorta, its measured flow can be used to examine cardiac output and ventricular performance while also informing assessment of vascular function. These linked outcomes make the measurement relevant beyond the vessel itself: it can connect cardiac pumping with the behavior of the circulation in clinical evaluation and cardiovascular research.
A basic measurement workflow begins by selecting an imaging approach, then acquiring information about blood velocity and aortic geometry. With Doppler echocardiography, the relevant signal comes from frequency shifts in reflected ultrasound waves. With phase-contrast magnetic resonance imaging, velocity is encoded in images. The resulting data can then support assessment of cardiac and vascular function.
Clinicians may use these measurements when evaluating valve disease, congenital heart conditions, or abnormalities of the aorta. The same information can support treatment planning by showing circulatory features relevant to management. In this context, aortic flow measurement is not limited to diagnosis; it also contributes to decisions about how cardiovascular problems should be assessed and addressed.
Aortic flow measurements can track circulatory changes during treatment or exercise, allowing investigators to examine how flow responds when cardiovascular conditions or demands change. This makes the technique useful for longitudinal clinical assessment and physiology research. Rather than providing only a static observation, measurements obtained in these contexts can relate aortic flow to changing cardiac and vascular states.