Coronary Flow Measurement
Coronary Flow Measurement - Related Videos
06:39
Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice
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Cited by 20 •
2015
Coronary flow reserve (CFR) is useful for assessment of myocardial oxygen demand and evaluation of cardiovascular risk. This study establishes a step-by-step transthoracic Doppler echocardiographic (TTDE) method for longitudinal monitoring of the changes in CFR, as measured from coronary artery in mice, under the experimental pressure overload of aortic banding.
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...
07:36
Isolation of Mouse Coronary Endothelial Cells
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Cited by 18 •
2016
This protocol is prepared to share our method of isolating mouse coronary endothelial cells for the purpose of imaging or to conduct molecular biological experiments.
01:26
Coronary Artery Disease IV: Preventive Measures
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2025
Effective preventive measures for coronary artery disease (CAD) focus on controlling modifiable risk factors, including cholesterol abnormalities and lifestyle changes.Cholesterol ManagementFirst, the Mediterranean diet and the American Heart Association advocate for maintaining low-density lipoprotein (LDL) cholesterol levels below 100 mg/dL, with a more stringent recommendation of below 70 mg/dL for individuals at high risk. LDL cholesterol, often termed "bad cholesterol," can lead to the...
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
A vessel's visible caliber does not by itself establish whether heart muscle receives enough oxygenated blood. Coronary flow measurement adds functional information by assessing blood movement rather than anatomy alone. This distinction is important when arterial narrowing appears limited yet microvascular dysfunction or physiologically meaningful disease may still affect myocardial perfusion.
Pharmacologically induced hyperemia provides a condition intended to increase coronary flow for comparison with resting flow. The resulting contrast supports calculation of coronary flow reserve, which indicates how effectively the coronary circulation can augment delivery when perfusion requirements change. This comparison helps identify impaired flow capacity that resting measurements alone may not reveal.
Doppler-based recording and thermodilution offer complementary ways to quantify coronary flow. Doppler focuses on blood-flow velocity, whereas thermodilution uses a temperature-based measurement principle. Because the techniques rely on different measurement signals, selecting between them can depend on the clinical or research protocol and the type of assessment required. Both support physiological evaluation beyond angiographic appearance.
A typical assessment compares coronary flow at rest with flow during pharmacologically induced hyperemia, then uses the paired measurements to calculate coronary flow reserve. The key procedural feature is obtaining quantitative data under both conditions, using Doppler velocity recording or thermodilution. This paired approach allows researchers and clinicians to evaluate the circulation's capacity beyond its resting state.
The measurement is especially useful when clinicians need to investigate impaired microvascular function or determine whether coronary artery disease has physiological significance. It can reveal functional impairment that an angiogram may not show clearly, helping connect an anatomic finding with its effect on myocardial blood supply. This makes coronary flow data a complementary tool rather than a replacement for imaging.
Comparative flow assessments can show whether coronary physiology changes after an intervention, rather than only whether the artery's appearance changes. The same framework supports research on treatment responses by comparing measured flow under defined conditions. In medicine, these outcomes help evaluate functional benefit alongside structural findings from angiography and clarify whether blood supply to the heart muscle has improved.