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Showing 1 to 20 of 55 for “"heart muscle"”.
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Study of the heart muscle in health and disease
… new matter at all. It endeavours to examine all heart conditions from the standpoint of the heart muscle and it aims at emphasising the great importance of the myocardium in cardiac disease. Modern research has shown conclusively that whatever kind of heart-lesion may be present, the real factor …
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A theoretical study of left ventricular and heart muscle dynamics
… of the left ventricle of the human heart considered as a pump have been extensively analysed. Using a new approach relying heavily on the Tensor Calculus, a theoretical model describing the mechanical and dynamical operation of the left ventricle has been developed. This has …
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Hydration and Water Distribution Studies of Heart Muscle by Nuclear Magnetic Relaxation
The multinuclear magnetic relaxation behavior of heart muscle from chicken, pork, and beef is investigated. Nonlinear regression analysis of the $\sp1$H transverse magnetization decay yields the best fit with three exponential components that are likely to correspond to three separate types of …
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Cellular Movements of Calcium and the Activation Process in Mammalian Heart Muscle
The contractile strength of heart muscle is strongly dependent on the rate of beating, and on the pattern of previous contractions over a period of many seconds. The activator calcium ions, which are responsible for the magnitude of contraction triggered by each action potential, are released from …
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Elucidation of Emergent Regional Mechanisms of Heart Muscle Dysfunction in the Mouse Model of Duchenne Muscular Dystrophy
… mishandling have not been defined in the whole heart. Here, we elucidate, for the first time, loci- and age-dependencies between calcium mishandling and myocardial sheet function as a manifestation of dystrophin-deficient cardiomyopathy. We also map calcium transients to illustrate the regional …
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Histogenesis of the heart muscle of the pig in relation to the appearance and development of the intercalated discs
Thesis (M.A.)--University of Kansas, Zoology, 1918. ; Includes bibliographical references.
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Modeling the Effects of Mechanical Loading on Hypertrophic Cardiomyopathy Pathogenesis in Human Induced Pluripotent Stem Cell derived Micro Heart Muscle
… factors such as blood pressure are critical in heart function and disease. Therefore, understanding how mechanical factors contribute to phenotypes in diseases like hypertrophic cardiomyopathy is critical for developing effective therapeutics. Promising approaches in tissue engineering and stem …
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Activation in Mammalian Heart Muscle: Effects of Calcium Modulators and Pattern of Stimulation on Action Potential Configuration and Contraction in Guinea Pig Atrium
Made available in DSpace on 2014-12-14T05:40:40Z (GMT). No. of bitstreams: 1 7606928.pdf: 5321702 bytes, checksum: 1c74ab215aa97086c956220aa24dffd6 (MD5) Previous issue date: 1975
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Pharmacological Interventions in Atrial Fibrillation
… within the atria, taking precedence over the heart's natural pacemaker, which can no longer regulate the heart's rhyth. This leads to irregular and often excessively fast contractions of the atrial heart muscle cells, resulting in a variety of symptoms like an irregular heart rate, …
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Shark Heart
Shark Heart is a manuscript of poems that maneuver between fearlessness and tenderness at the drop of a dime. In the same way that many sharks need to survive by constantly swimming in order to extract oxygen from the water streaming between their gills, the heart muscle needs to constantly pump …
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Use of fluorescent micropsheres to measure coronary flow reserve in rat animal model
Heart attacks result from reduced or blocked blood flow through major coronary arteries, resulting in permanent damage to heart muscle. Coronary blood flow (CBF) is thus important to measure in experimental animal models of heart disease. A standard method to measure CBF uses tracer microspheres (O …
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Sequence motifs predictive of tissue-specific skipping
… tissue-specific skipped exon sets for brain, heart, muscle and testis, we find sequence features in the exon and flanking introns that distinguish these tissue-specific skipped exons from constitutive exons. Lastly, we use sequence-based scoring based on these features to predict …
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Influence of Dietary Arginine Deficiency and Increased Nitrogen Metabolism on the Induction of Orotic Aciduria
… greater in liver slices than slices of heart, muscle, kidney, and minced spleen when ammonia was used as a nitrogen source. The order of orotate biosynthesis from ('14)C-bicarbonate was liver > spleen > kidney > muscle > heart. Arginine deficiency resulted in a significant stimulation of …
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Biomimetic cytoskeleton assemblies and living cells on micropillar force sensor arrays
… cultivation of fibroblasts, epithelial cells and heart muscle cells on their tops. Cellular traction forces are determined by measuring the bending of the pillar tops during cell movement. A model system for the actin cortex is produced by crosslinking actin filaments on the pillar heads, with the …
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Absorption, Distribution and Excretion of Oxytetracycline and Tetracycline in Female Beagles
… present in the kidney, followed by the liver, heart, muscle, and lung in declining order of concentration. A positive correlation was demonstrated between coexistent mean plasma and tissue concentrations for the tissues examined.
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Interactions of Cardiomyocytes and Myofibroblasts: An Experimental and Theoretical Model Study
… hypertension or infarction, fibroblasts in the heart can convert to myofibroblasts, a larger and more contractile phenotype between a fibroblast and a smooth muscle cell. Myofibroblasts are essential to wound healing, but can change the compliance and functioning of heart tissue and can produce …
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Early prototyping and testing of a model of an expandable heart valve apparatus for paediatric deployment
Valvular heart disease is any abnormal condition which involves one or more of the heart valves - the aortic and mitral valves on the left and the pulmonary and tricuspid valves on the right. Valves diseases in infants are congenital and their effect is to burden the heart with an increased work to …
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Atropa belladonna L. : uma releitura da matéria médica homeopática
… acetylcholine to receptors present on smooth muscle, heart muscle, sinoatrial nodes and atrioventricular of the heart and exocrine glands. The popular name belladonna is due to the use of this plant in the cosmetics of Italian women in past decades, with the juice of its fruit, would try to …
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Automated auscultation : using acoustic features to diagnose mitral valve prolapse
… a primary-care physician listens to the heart using a stethoscope to assess the condition of the heart muscle and valves. This process, termed cardiac auscultation, is the primary means of diagnosing cardiac disorders, the most common of which is Mitral Valve Prolapse (MVP). Yet, the …
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Implantierbares elektromechanisches Blutpumpensystem zur langfristigen partiellen Herzentlastung
… for VADs represents the support of the failing heart function with the aim of heart recovery, "bridge to recovery". This dissertation describes the development of a long-term implantable therapeutic heart support system for the recovery of heart muscle by partial unloading of the left ventricle. …
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