Buckling Behavior of Arteries Under Torsion

2011 ◽  
Author(s):  
Justin R. Garcia ◽  
Shawn D. Lamm ◽  
Hai-Chao Han
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Blood Vessels ◽  
High Blood Pressure ◽  
Atherosclerotic Plaque ◽  
Vascular Grafts ◽  
Vascular Diseases ◽  
The Body ◽  
Buckling Behavior ◽  
Surgical Implantation

Arterial tortuosity is a phenomenon which is observed throughout the body and is associated with aging, diabetes, high blood pressure, and other vascular diseases [1]. Tortuous arteries significantly hinder blood flow which may lead to the development of atherosclerotic plaque buildup [2]. Blood vessels may also become twisted or demonstrate 3-D tortuous shapes when subject to large twist deformations such as during surgical implantation of vascular grafts, propeller flap procedures, stent-artery interactions, and sudden movements of the neck or limbs [4–6]. However, the twisting behavior of arteries is poorly understood.

COMPARISON OF ANTIHYPERTENSIVE EFFECT OF MOXONIDINE VERSUS CLONIDINE IN RENAL FAILURE PATIENTS.

2018 ◽  
Vol 6 (9) ◽  
Author(s):  
DR.MATHEW GEORGE ◽  
DR.LINCY JOSEPH ◽  
MRS.DEEPTHI MATHEW ◽  
ALISHA MARIA SHAJI ◽  
BIJI JOSEPH ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Renal Failure ◽  
Blood Flow ◽  
Blood Vessel ◽  
Blood Vessels ◽  
High Blood Pressure ◽  
Antihypertensive Effect ◽  
The Body ◽  
Ability To Work ◽  
Blood Flows

Blood pressure is the force of blood pushing against blood vessel walls as the heart pumps out blood, and high blood pressure, also called hypertension, is an increase in the amount of force that blood places on blood vessels as it moves through the body. Factors that can increase this force include higher blood volume due to extra fluid in the blood and blood vessels that are narrow, stiff, or clogged(1). High blood pressure can damage blood vessels in the kidneys, reducing their ability to work properly. When the force of blood flow is high, blood vessels stretch so blood flows more easily. Eventually, this stretching scars and weakens blood vessels throughout the body, including those in the kidneys.

Edema, Fainting, and Strokes

2021 ◽  
pp. 216-240
Author(s):  
Graham Mitchell
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Blood Vessels ◽  
High Blood Pressure ◽  
Fluid Pressure ◽  
Basement Membranes ◽  
Tissue Pressure ◽  
Efficient Mechanisms ◽  
The Brain ◽  
Mediated Reduction

High blood pressure in humans is often associated with heart failure, edema, strokes, and episodes of fainting. Giraffes never show these. Edema, the abnormal collection of fluid in the lower legs, is prevented in giraffes by a combination of thick basement membranes of capillary blood vessels, which probably reduce their permeability to proteins, a very high tissue pressure that resists flow of fluid out of capillaries, and efficient mechanisms for returning blood to the heart. Fainting occurs when blood flow (and thus oxygen and glucose supply) to the brain is reduced. When a giraffe lifts its head after drinking water there is a sudden reduction of blood flow to the head, and fainting should result. Fainting is avoided because the blood flow that remains is diverted completely to the brain by a unique arrangement of blood vessels and nerves, and by structures that maintain the perfusion pressure of the blood flowing through the brain. Strokes can be caused by rupture of small blood vessels in the brain when they are exposed to high blood pressure of the kind reached in the head of a giraffe when it drinks surface water. Rupture of brain blood vessels is prevented in giraffes by mechanisms that reduce pressure. The posture adopted while drinking, baroreceptor-mediated reduction in cardiac output, the effects of the carotid rete, diversion of blood away from the brain, an increase in cerebrospinal fluid pressure, and passive and active constriction of blood vessels, all contribute.

Living Well to Keep Your Pressure Down

EDIS ◽  
2017 ◽  
Vol 2017 (6) ◽  
Author(s):  
Linda B. Bobroff
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Blood Vessels ◽  
High Blood Pressure ◽  
Health Problems ◽  
Fact Sheet ◽  
Living Well ◽  
Heart Work ◽  
Major Revision ◽  
Reduce Risk

High blood pressure, or hypertension, can cause serious health problems. It makes your heart work harder and can damage your blood vessels even if you feel okay. Everyone should have their blood pressure checked regularly. If you have certain risk factors, you are more likely to have high blood pressure. This 6-page fact sheet is a major revision that discusses risk factors and ways to reduce risk.

The Effect of Green Coffee Consumption on High Blood Pressure

2021 ◽  
Author(s):  
Mahdieh Hosseinzadeh ◽  
Fatemeh Pakravanfar ◽  
Elham Hosseinzadeh ◽  
Maryam Khosravi
Keyword(s):  
Blood Pressure ◽  
Clinical Trials ◽  
High Blood Pressure ◽  
Coffee Consumption ◽  
Vascular Diseases ◽  
Publication Date ◽  
Green Coffee ◽  
Chlorogenic Acids ◽  
Coffee Intake ◽  
Randomized Controlled Clinical Trials

Background: Hypertension is a major risk factor for the development of coronary, cerebrovascular, and peripheral vascular diseases, which lead to myocardial infarction, stroke, and vascular death. Green coffee extract is particularly producer a great deal of chlorogenic acids (CGA) that may reduce the risk of high blood pressure. Therefore, the target of the study was to summarize the available publications on the effect of green coffee consumption on high blood pressure. Methods: The systematic review was done with a search in PubMed-Medline and Scopus. The search strategy included keywords related to blood pressure and green coffee. Inclusion criteria were randomized controlled clinical trials conducted on people aged between 18 and 70 years. The publication date of articles  was from 2004 to 2018. Exclusion criteria were articles not published in English. Results: We discussed five articles that included  our criteria. Green coffee had moderate effects on high blood pressure.  It sounds that the effect of green coffee on reducing blood pressure is because of its phenolic compounds, as well as caffeine and chlorogenic acids, coffee’s roasting status, participants’ ethnicity, and even gender. Conclusion: Green coffee intake for a long time might moderately decrease blood pressure. However, there is still a need for further clinical trials.

Oxygen consumption and blood flow in the hypothermic, perfused kidney

1959 ◽  
Vol 197 (5) ◽  
pp. 1111-1114 ◽  
Author(s):  
Matthew N. Levy
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Oxygen Consumption ◽  
Blood Viscosity ◽  
The Body ◽  
Peripheral Artery ◽  
Isolated Kidney ◽  
Arterial Blood ◽  
Oxygen Difference ◽  
Appreciable Reduction

Temperature was diminished in a stepwise fashion in the isolated kidney of the dog perfused from a peripheral artery of the original, normothermic animal. Decreased temperature resulted in an appreciable reduction of renal blood flow at constant arterial blood pressure. Increased blood viscosity and vasoconstriction were both responsible for this reduction of flow. Hypothermia also resulted in a reduction in arteriovenous oxygen difference which was roughly proportional to the centigrade temperature. Furthermore, hypothermia exerted a marked but reversible depression of the rate of oxidative metabolism. This effect was relatively more severe than the changes for the body as a whole at equivalent temperatures reported by other investigators.

scholarly journals Healthy Living for Elders: High Blood Pressure

EDIS ◽  
1969 ◽  
Vol 2004 (11) ◽  
Author(s):  
Leigh Ann Martin
Keyword(s):  
Blood Pressure ◽  
Blood Vessels ◽  
High Blood Pressure ◽  
Cooperative Extension ◽  
Cooperative Extension Service ◽  
Extension Service ◽  
Publication Date ◽  
Healthy Living ◽  
University Of Florida ◽  
Increased Pressure

High blood pressure is increased pressure of blood on the blood vessels. This creates more work for the heart. Another name for high blood pressure is hypertension. About 50 million Americans may have hypertension. Many are not even aware they have a problem. This document, FCS8599-Eng, is one in a series of the Department of Family, Youth and Community Sciences, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611. Publication date: March 2004.  https://edis.ifas.ufl.edu/fy684

scholarly journals KARAKTERISTIK INDEKS MASSA TUBUH DAN JENIS KELAMIN PASIEN HIPERTENSI DI RS IBNU SINA MAKASSAR NOVEMBER 2018

2021 ◽  
Vol 7 (2) ◽  
pp. 64
Author(s):  
Rachmat Faisal Syamsu ◽  
Siska Nuryanti ◽  
Muhammad Yastrib Semme
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Nutritional Status ◽  
High Blood Pressure ◽  
Sodium Intake ◽  
Sampling Technique ◽  
The Body ◽  
Number Of Patients ◽  
High Prevalence ◽  
Male Patients

Hypertension, commonly referred to as high blood pressure, is a global health problem in Indonesia because of its high prevalence, although it varies in different countries. In Indonesia, hypertension is found in 83 per 1000 household members. The majority of high blood pressure increases with the presence of risk factors such as; Age, lack of exercise / physical activity, genetic factors and family history, body weight/obesity, sodium intake, alcohol consumption, smoking, stress. This study is a descriptive design using an observational approach to describe the characteristics of the risk factors for the Body Mass Index (BMI) and the gender of hypertension patients at Ibnu Sina Hospital for November 2018. The sampling technique used the total sampling technique with a complete sample size of 26 people. The results showed that the gender characteristics of hypertension sufferers showed that the number of female patients (16 people) was more than that of male patients (10 people). And the attributes of BMI in patients with hypertension found that the number of patients with normal nutritional status (13 people) was the most compared to another nutritional status.

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

Abstract 025: AMP-activated Protein Kinase Mediates Pressure Overload-induced Hypertrophy

Hypertension ◽  
2016 ◽  
Vol 68 (suppl_1) ◽  
Author(s):  
Jinli Wang ◽  
Nanhu Quan ◽  
Lin Wang ◽  
Courtney Cates ◽  
Ji Li
Keyword(s):  
Blood Pressure ◽  
Protein Kinase ◽  
High Blood Pressure ◽  
Morphological Changes ◽  
Heart Function ◽  
Pressure Overload ◽  
Vascular Diseases ◽  
Adenosine Monophosphate ◽  
Macrophage Infiltration ◽  
Therapeutic Drug

Hypertension is a major risk factor of death and disability from heart and vascular diseases. Heart hypertrophy caused by pressure overload is characterized by the activation of adenosine monophosphate-activated protein kinase (AMPK), which is the major energy sensor in the heart. However, the anti-inflammatory effect of AMPK has not been investigated in the hypertrophy model. Activated protein C (APC) is a vitamin-K dependent plasma serine protease which inhibits blood clotting, and APC is an endogenous AMPK agonist. This study was designed to examine the role of AMPK in hypertrophy and the underlying mechanisms by which APC inhibits heart hypotrophy by pressure overload. We hypothesize that AMPK play a role in preventing heart from hypertrophy induced by pressure overload. APC could inhibit high blood pressure-induced hypertrophy via activation of AMPK signaling pathway. Wild-type (WT) and AMPK-kinase dead (KD) transgenic mice were subjected to transverse aortic constriction (TAC) surgery. Echocardiography was performed to evaluate the heart function, and histology staining revealed the morphological changes. Real-time PCR and western blotting were used to detect the signaling changes of both mRNA and protein expression levels. There is no phenotype difference between WT and AMPK-KD mice under normal physiological conditions. However after 4 weeks of TAC surgery, AMPK-KD mice demonstrated significantly bigger heart than WT mice (p<0.05), and the cardiac functions measured by echocardiography in AMPK-KD hearts were significantly impaired as compared with WT hearts (p<0.05). The immunohistochemical staining showed that the increased macrophage infiltration and reactive oxygen species (ROS) including activated p66shc, 4-HNE and ERK were observed in the AMPK-KD hearts after 4 weeks of TAC surgery (all p<0.05 versus WT hearts). APC administration significantly attenuated hypertrophy and fibrosis caused by pressure overload, and macrophage infiltration and p66shc activation were also inhibited by APC treatment. Therefore, Cardiac AMPK deficiency aggravates hypertrophy caused by pressure overload. AMPK activator APC could be a therapeutic drug for treatment of hypertrophy by high blood pressure.

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