scholarly journals Hydraulic and Hemodynamic Studies on the Blood Flow through the Cardiovascular System

1978 ◽  
Vol 19 (2) ◽  
pp. 271-280 ◽  
Author(s):  
Hideomi FUJIWARA ◽  
Koichi TANIGUCHI ◽  
Tomohiro IIZUMI ◽  
Akihiro NIWA ◽  
Takashi YAMADA ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cardiovascular System ◽  
Flow Through

scholarly journals A plumber’s guide to the cardiovascular system

2020 ◽  
Vol 44 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Shannon E. Washburn ◽  
Randolph H. Stewart
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Blood Flow ◽  
Cardiovascular System ◽  
Interactive Teaching ◽  
Teaching Laboratory ◽  
Clinical Correlates ◽  
Student Volunteers ◽  
Flow Through ◽  
Student Discussion

Blood flow through the cardiovascular system is governed by the same physical rules that govern the flow of water through domestic plumbing. Using this analogy in a teaching laboratory, a model of the cardiovascular system constructed of pumps and pipes was used to demonstrate the basic interactions of pressure, flow, and resistance in a regulated system, with student volunteers providing the operational actions and regulatory components. The model was used to validate predictions and explore solutions prompted by student discussion. This interactive teaching laboratory provides an engaging experiential exercise that demonstrates regulation of flow and pressure in an intact cardiovascular system with apposite changes in heart rate and resistance. In addition, the system provides strong clinical correlates and illustrates how that regulated system responds to challenges such as heart failure, inappropriate vasodilation, and hemorrhage. The results demonstrate that, with limited practice, the instructor can effectively guide the students to reliably reproduce physiologically appropriate results.

scholarly journals A REVIEW: ANGIOGRAPHY AND ANGIOPLASTY

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Md Zeeshan ◽  
Deshbandhu Joshi
Keyword(s):  
Cardiovascular Disease ◽  
Blood Flow ◽  
Cardiovascular System ◽  
Blood Vessels ◽  
Heart Attack ◽  
The Body ◽  
X Rays ◽  
Thin Tube ◽  
Flow Through ◽  
Heart Blood

The cardiovascular system refers to the heart, blood vessels and the blood. Blood contains oxygen and other nutrients which your body needs to survive. The body takes these essential nutrients from the blood. Angiography is an imaging test that uses X-rays to view your body's blood vessels. The X-rays provided by an angiography are called angiograms. This test is used to study narrow, blocked, enlarged, or malformed arteries or veins in many parts of your body, including your brain, heart, abdomen, and legs. Angioplasty is a procedure to restore blood flow through the artery. You have angioplasty in a hospital. The doctor threads a thin tube through a blood vessel in the arm or groin up to the involved site in the artery. The tube has a tiny balloon on the end. Cardiovascular disease generally refers to conditions that involve narrowed or blocked blood vessels that can lead to a heart attack, chest pain (angina) or stroke. Other heart conditions, such as those that affect your heart's muscle, valves or rhythm, also are considered forms of heart disease. Keyword: cardiovascular system, angiography, angioplasty

BLOOD FLOW IN ARISTOTLE

2020 ◽  
Vol 70 (1) ◽  
pp. 137-153
Author(s):  
Claire Bubb
Keyword(s):  
Blood Flow ◽  
Cardiovascular System ◽  
Vascular System ◽  
Vantage Point ◽  
Scholarly Work ◽  
Ancient Greek ◽  
Accurate Picture ◽  
Flow Through ◽  
Circulation Of The Blood ◽  
Ancient Greek Medicine

Modern readers view ancient theories of blood flow through the lens of circulation. Since the nineteenth century, scholarly work on the ancient understanding of the vascular system has run the gamut from attempting to prove that an ancient author had in fact, to some extent or another, pre-empted Harvey's discovery of the circulation of the blood or towards attempting, often with some empathetic embarrassment, to explain the failure on the part of an ancient author to notice something that seems so obvious to the modern eye. Thus C.R.S. Harris's 1973 book The Heart and Vascular System in Ancient Greek Medicine, which remains the standard on the topic, opens with a sentence in which he marvels at how the otherwise admirable ancient Greek physicians could have ‘failed entirely to arrive at any conception of the circulation of the blood’. This modern vantage point has had an unfortunate effect. In the case of Aristotle in particular, understanding of his cardiovascular system has been diminished by a tendency to define it in contradistinction to our own modern understanding of circulation. By deliberately uncoupling from the framework of modern physiology, this paper will offer a richer and more accurate picture of his views.

A Non-Newtonian Fluid Flow Model for the Slip Condition on Blood Flow through a Stenosed Artery using Power-law Fluid

2018 ◽  
Vol 9 (7) ◽  
pp. 871-879
Author(s):  
Rajesh Shrivastava ◽  
R. S. Chandel ◽  
Ajay Kumar ◽  
Keerty Shrivastava and Sanjeet Kumar
Keyword(s):  
Blood Flow ◽  
Fluid Flow ◽  
Newtonian Fluid ◽  
Power Law ◽  
Flow Model ◽  
Slip Condition ◽  
Power Law Fluid ◽  
Stenosed Artery ◽  
Flow Through

scholarly journals Numerical Study of Blood Flow Through Artificial Heart Valves

2021 ◽  
Vol 1094 (1) ◽  
pp. 012120
Author(s):  
Hussein Togun ◽  
Ali Abdul Hussain ◽  
Saja Ahmed ◽  
Iman Abdul hussain ◽  
Huda Shaker
Keyword(s):  
Blood Flow ◽  
Artificial Heart ◽  
Heart Valves ◽  
Numerical Study ◽  
Artificial Heart Valves ◽  
Flow Through

scholarly journals A Simple Transient Poiseuille-Based Approach to Mimic the Womersley Function and to Model Pulsatile Blood Flow

Dynamics ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 9-17
Author(s):  
Andrea Natale Impiombato ◽  
Giorgio La Civita ◽  
Francesco Orlandi ◽  
Flavia Schwarz Franceschini Zinani ◽  
Luiz Alberto Oliveira Rocha ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Blood Flow ◽  
Boundary Conditions ◽  
Quadratic Function ◽  
Pulsatile Blood Flow ◽  
Flow Through ◽  
Simplified Analysis ◽  
Function Models ◽  
Flow Reversals

As it is known, the Womersley function models velocity as a function of radius and time. It has been widely used to simulate the pulsatile blood flow through circular ducts. In this context, the present study is focused on the introduction of a simple function as an approximation of the Womersley function in order to evaluate its accuracy. This approximation consists of a simple quadratic function, suitable to be implemented in most commercial and non-commercial computational fluid dynamics codes, without the aid of external mathematical libraries. The Womersley function and the new function have been implemented here as boundary conditions in OpenFOAM ESI software (v.1906). The discrepancy between the obtained results proved to be within 0.7%, which fully validates the calculation approach implemented here. This approach is valid when a simplified analysis of the system is pointed out, in which flow reversals are not contemplated.

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