Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 52 for “"ATRIA"”.
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Urban sunspaces : ecology of atria and arcades
Historically, atria were protected interior patios; well perceived for their climate tempering and spatial amenity to the building; matching a peaceful private outdoor with the yearly climate cycles. Public buildings adopted this in larger scale, and with the ending 18th century, atria and arcades …
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Cellular Calcium Movements and Excitation-Contraction Coupling in Guinea Pig Atria
Guinea pig left atria were suspended in a tissue bath of normal Krebs-Henseleit solution which was aerated with 95% O$\sb2$/5% CO$\sb2$ and maintained at 27$\sp\circ$C. The atria were attached to a force transducer and impaled with calcium sensitive micro-electrodes. The tissue was stimulated …
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Endogenous cardioactive substances in blood: effects on the isolated guinea-pig atria
Investigations were made into the role of blood-borne substances affecting myocardial contractility. Isolated left and right guinea-pig au -ia were used as bioassay for the detection of endogenous cardiotonic substances in bovine serum. Results show that serum that had been buffer exchanged to …
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Effects of Portuguese Man-of-War (PHYSALIA PHYSALIS) Venom on Isolated Rabbit Atria
… man-of-war venom were studied using isolated atria from rabbits. Venom added (7.1 µg protein/ml) to the bath solution stimulates heart rate 120% (P < 0.01) and increases contraction amplitude 308% (P < 0.001). Both effects are dependent on bath concentrations of venom and calcium. The increase …
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Effects of Training on Atrial Rate and Sensitivity of Isolated Rat Atria to Catecholamines and Acetylcholine
… heart rate. The response of all isolated rat atria to different drugs were observed. Epinephrine in concentrations of 1 X10-5M, 1X10-6M and 1X10-7M increased the atrial rate in trained rats by averages of 41.3%, 20.04% and 15.3% respectively, and in control animals by averages of 18.6%, 11.1% …
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THE EFFECT OF THYROID HORMONES ON THE FORCE OF CONTRACTION OF LEFT ATRIA OF GUINEA-PIGS IN UITRO
… were investigated in guinea-pig isolated left atria from animals pretreated for varying lengths of time with L-thyroxine or carbimazole. The guinea-pigs were pretreated with either L-thyroxine (lOug, lOOug and Img/kg body weight/day) or with carbimazole (Img and 2mg/kg body weight/day) for …
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The Effect of Exercise Training on the Response of Isolated Rat Atria to Acetylcholine at 30°C and 37°C
… heart rates were measured in the intact rats. Atria were isolated in an organ bath containing Krebs-Henseleit solution. The chronotropic responses of the atria were tested in the presence of varying concentrations of acetylcholine at two temperature levels. Rats engaged in the exercise programs …
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Postsynaptic Cholinergic Control Of Cardiac Function In Aging
… et al (1961) declined significantly in the atria and ventricles of the aged compared to adult rats. (ii) No age-related difference was seen in muscarinic receptor number in the atria and ventricles as assessed by {dollar}lbracksp3rm Hrbrack QNB{dollar} binding, but the muscarinic receptor …
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Development of a procedure for predicting daylighting in square type atrium
The popularity of the atria after its revival since the 1970's has caught the attention of designers and opened ways for new strategies of energy conservation for large buildings. Early atria were visual statements rather than integrated energy systems. But a growing recognition of the contribution …
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The effect of atrium configurations on energy usage in high-rise office buildings in semi-arid climate of Tehran
… the impact of different configurations of atria on the energy performance of tall office buildings in Tehran. Despite having a rich history of climatic conscious design, the contemporary architecture of the Middle East, and Iran as one of the countries in this region, has witnessed …
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Cardiac Vasoactive Peptides in Hypertrophic Cardiomyopathy of Cats
… and BNP are normally produced and stored in the atria. With HCM, significant peptide and mRNA expression of BNP is found in the ventricles, while protein and gene expression of ANP remains mainly in the atria. This pattern agrees with increases in plasma concentrations of both peptides in cats …
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An implantable hydrogel for the delivery of cisplatin and the ex vivo neurotoxic, neuromyopathic and cardiotoxic activity of platinum-based anticancer drugs and macrocyclic drug delivery systems
… was examined using the rat right and left heart atria. Results show that incubation of the atria tissue with 300 μM of cisplatin reduced the contraction rate of the right atria by 68.8 ± 1% (p = 0.001) and in the left atria by 1 ± 1% (p = 0.4) by the end of the two hour period study. When …
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Regional Mechanical Properties and Microstructure of Ovine Heart Chambers
… portions of the left and right ventricles, atria, and appendages underwent biaxial mechanical testing. A Fung-type strain energy function was used to fit the experimental data. Tissue behavior was quantified based on the magnitude of strain energy, as an indicator of tissue stiffness, at …
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Calidad de la anticoagulación oral con antagonistas de la vitamina K: papel del tiempo en rango terapéutico como variable pronóstica de eventos adversos en la fibrilación auricular.
… validados de riesgo de sangrado (HAS-BLED, ATRIA, ORBIT y HEMORR2HAGES) para comprobar si la capacidad predictiva y utilidad clínica de ATRIA, ORBIT y HEMORR2HAGES podría mejorar añadiendo el criterio “INR lábil (TRT <65%)”. Métodos: Estudio de carácter observacional, con seguimiento …
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Adrenergic-cholinergic interactions in the heart
In the mammalian atrial myocardium the muscarinic receptor agonist carbacholcan inhibit the positive inotropic responses to isoproterenol, a f3-adrenoceptor agonist, forskolin, a direct activator of adenylate cyclase, IBMX, a phosphodiesterase inhibitor, and phenylephrine, an a-adrenoceptor …
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Modeling buoyancy-driven airflow in ventilation shafts
… in multi-story buildings. Such systems rely on atria or ventilation shafts to provide a pathway for air to rise through the building. Although numerous modeling techniques are used to simulate naturally ventilated buildings, airflow network tools (AFNs) are most commonly used for annual …
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Pharmacological Interventions in Atrial Fibrillation
Atrial fibrillation arises when abnormal electrical signals suddenly initiate 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, …
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The sophisticated architecture of the rat atrioventricular node
… potential spontaneously generated in the sinoatrial (SA) node propagates through the atria to reach the atrioventricular (AV) node. As the only conduction pathway between the atria and ventricles, the AV node functions to delay and regulate action potential conduction between the atria and …
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RUOLO DELLA STIMOLAZIONE VAGALE SULLA PROLIFERAZIONE DEI FIBROBLASTI CARDIACI IN VIVO IN MODELLO ANIMALE DI FIBRILLAZIONE ATRIALE.
… including hypertrophy, failure, and arrhythmias. Atrial fibrillation (AF) is the most common sustained clinical arrhythmia and is a major cause of population morbidity and mortality. Recent studies have demonstrated that structural remodeling, involving prominent fibrotic changes, is a fundamental …
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A master plan for Christian Growth Academy Christiansburg, Virginia
… built of concrete masonry with aluminum-framed atria was proposed, responding primarily to the administration’s desire for a low cost, low maintenance structure which provided a maximum of natural illumination. Although the building would have a distinct presence within the existing …
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