Free Cardiac muscle Essays and Papers

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    Generating and Replacing Cardiac Muscle

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    Is the differentiation of Cardiac stem cells, (CSC’s) into cardiac myocytes (heart tissue), the best way to regenerate and replace cardiac muscle? Cardiac stem cells z In 2012, the Cochrane Collaboration; an organisation that analyses medical studies, analysed 33 trials which included 1,765 patients concerning stem cells that were injected into their hearts in an attempt to improve the heart’s pumping ability. On average the injected stem cells only increased the heart’s pumping ability by 3-4 percent;

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    Cardiac Muscle Cells

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    Heart (Cardiac Muscle) Cells Question 1: Briefly describe, in 500 words or less, the normal structure and function of your chosen cell type. In your answer, discuss specific features in your chosen cell type, including cell organelles. Throughout the heart, Cardiac Muscle cells are connected together to form a large network from one end to the other. These cells form a shape such that each individual cell always remains in-contact with 3 others cells at all times. The cells are held together

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    Cardiac Muscle Contraction The heart is a muscular organ which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, as well as assists in the removal of metabolic wastes. In humans, the heart is located between the lungs and divided into four chambers: upper left and right atria; and lower left and right ventricles. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the

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    Through the process of each heartbeat, cardiac muscle contraction follows an electrical sequence. This sequence is initiated at the SA node generating an impulse which spreads through the AV node causing atrial systole. The electrical impulse then follows the AV bundle, bundle branches and the purkinje fibers producing ventricular systole. Series of electrical currents through the heart are able to be traced on the body surface by an electrocardiogram or ECG machine, a device that records voltage

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    deficiency that is caused by a block in the blood supply also known as a heart attack. The left ventricle is the common site for MI, which is the chamber of the heart that works the most. This results in fibrotic scar formation and permanently impaired cardiac function (Zammaretti 2004). Tissue changes in the myocardium are associated to how much the cells have been deprived of oxygen. Thi...

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    Muscle Cells in the Body

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    Muscle cells in the heart The heart is made up of cardiac muscles, which means that the heart will never get tired. The heart contains myocytes cells. The function of the myocytes is to contract and pump the blood from the heart to the lungs. Located at the right atrium of the heart, there is a group of cells, which is called the Sino atrial node. The Sino atrial node produces and releases electrical impulses, which ensure that the heart contracts and pumps the blood to the whole circulatory system

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    Hyperthyroidism: Thyroid Disease and the Heart

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    causing certain clinical manifestations. In hyperthyroidism, increased thyroid function leads to increased cardiac output at rest and after exercise but to decreased muscle bulk and function. The heart and nerve tissues become more sensitive to catecholamines due to increased binding sites for epinephrine and norepinephrine. Hyperthyroidism manifests systemically, affecting primarily muscle function and the central nervous system. there are different causes for the development of hyperthyroidism

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    Essay On Myoblasts

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    The safety, feasibility and efficacy of skeletal myoblast transplantation for MI have been extensively studied using a wide range of preclinical animal models. The results of skeletal myoblast transplantation for cardiac repair were first reported by Marelli et al. in 1992 [108]. Since, a number of investigators have worked with skeletal myoblasts using different techniques to track the survival of transplanted cells. This includes use of fluorescent cell-tracking dyes, nucleoside labeling such as

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    developed countries. The pathological process of the heart is related to altered expression of genes that are important for cardiac function. Thus, micro RNAs have become known as key regulators of gene expression and the recent studies have suggested the potential importance of micro RNAs; as diagnostic markers and therapeutic targets for many big diseases including cardiac diseases. Deregulated expression of micro RNA has been linked to the development of cardiovascular disease. The regulation

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    The Human Heart

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    2) and repolarization (phase 3) phases of the cardiac action potential. Like delayed afterdepolarization, early afterdepolarization relies on a prolonged action potential trigger additional activity. The amplitude of the early afterdepolarization is highly dependent on rate. The classical example is a patient with long QT syndrome and bradycardia that is triggered into torsades de pointes. Reentry is the final category of arrhythmias. Normally, a cardiac action potential is terminated when all the

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