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 10 of 10 for “"pulmonary vein"”.
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The role of intracellular Ca2+ in the arrhythmogenic activity of pulmonary vein cardiomyocytes
The pulmonary veins are widely recognised as a source of ectopic electrical activity that can cause atrial fibrillation. While the ectopic activity likely originates in the cardiomyocytes that form an external sleeve around the veins, the underlying mechanisms are unknown. Changes in intracellular …
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The Ultrastructural and Abnormal Calcium Handling in Pulmonary Vein Sleeve Cells, Atrial and Ventricular Myocytes During Ageing
… now that electric activities originating from pulmonary vein sleeve cells (PVCs) initiate AF. Factors that are involved in maintaining AF include structural remodelling and abnormal Ca<sup>2+</sup> handling in PVCs and atrial myocytes. Whilst structural changes and alterations in the …
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Real Time Frequency Analysis of Signals From Lasso Catheter For Radiofrequency Ablation During Atrial Fibrillation
… lasso catheter during radiofrequency ablation of pulmonary vein was performed to determine the channel with dominant frequency. Threshold algorithm was used for signals which could be classified as type I and type II AF. Type III AF Signals which were highly fractionated or differentiated were …
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Atrial Conduction and P-wave Characteristics: From histology to electrophysiology
… predicts the outcome of circumferential pulmonary vein isolation in patients with recurrent atrial fibrillation, respectively.
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Cellular mechanisms of acute hypoxic pulmonary vasoconstriction in intrapulmonary veins.
In the pulmonary circulation, alveolar hypoxia contributes to blood flow regulation. Hypoxic pulmonary vasoconstriction (HPV) involves both pulmonary arteries and veins, but little is known of the contractile mechanisms specific to the veins. The aim of these studies was to examine the hypoxic …
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Development of native and contrast enhanced magnetic resonance imaging for the characterization of cardiovascular disease
… ventricular scar after myocardial infarction and pulmonary vein and atrial wall lesions after radiofrequency (RF) ablation for atrial fibrillation (AF). The double inversion recovery (DIR) sequence is traditionally used for vessel wall imaging. It however requires a Look Locker scan to choose the …
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Functional characterization of mobilized tumor cells
… cells using blood samples withdrawn from the pulmonary vein after pulmonary lobectomy procedures. Previous studies did not distinguish tumor cells from normal epithelial cells specifically or sensitively. Single-cell genetic approaches were used to compare the genotype of isolated single cells …
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Hypoxia-induced responses of porcine pulmonary veins.
The pulmonary vein (PV) constricts to hypoxia however little is known about the underlying mechanisms. Hypoxic PV constriction is proposed to recruit upstream capillary beds and optimise gas exchange in healthy humans and may play a role in high altitude pulmonary oedema. The PV is also intrinsic …
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Relaxin: a new cardiovascular hormone in humans? Comparative potency and mechanisms of action
… larger calibre arteries (internal mammary) and veins (saphenous) using standard organ bath techniques. The effect of relaxin in veins has not previously been described. Internal mammary arteries and saphenous veins were obtained from patients undergoing coronary artery bypass surgery. Small …
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Aislamiento de venas pulmonares en el Centro Internacional de Arritmias ‘Andrea Natale’ - Fundación Cardio infantil
Introducción: El Aislamiento de Venas Pulmonares (AVP) es un procedimiento de alto costo al cual son sometidos pacientes con riesgo cardiovascular elevado. Requiere un alto grado de especialización en el personal médico y paramédico que lo ejecuta, con curvas de aprendizaje que sobrepasan los dos …