Global ETD Search
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Showing 1 to 8 of 8 for “"pulmonary veins"”.
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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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Unterschiedliche autonome Innervation in Pulmonalvene, linkem Vorhof und rechtem Vorhof : eine elektrophysiologische und pharmakologische Charakterisierung
Ectopic beats originating in the pulmonary veins initiate atrial fibrillation. We evaluated the differential effects of combined locally increased neuronal tone an dilatation on effective refractory periods in pulmonray veins, right atrium and left atrium and correlated these functional properties …
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Dreidimensionale Rekonstruktion transösophagealer zweidimensionaler Schnittbilder zur quantitativen Analyse von Vorhofseptumdefekten vom Sekundum-Typ
… annulus and the orifices of the caval and pulmonary veins were also measured. The atrial septal defect area ranged from 0.2 to 2.4 cm2 (diastole) to 0.5 to 5.6 cm2 (systole). The maximal area at end-systole was 108% of the area at the beginning of the systole, and the minimal area at …
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Elucidating how mutations in EIF2AK4 cause pulmonary vascular disease
Pulmonary veno-occlusive disease (PVOD) is an incurable condition characterised by the progressive remodelling of pulmonary veins, venules and capillaries. This obstruction of the pulmonary vessels causes increased pulmonary pressures which leads to right ventricular hypertrophy, and death within …
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Segmentation and visualization for cardiac ablation procedures
… variability of the left atrium shape and of the pulmonary veins that drain into it presents significant difficulties for cardiac ablation. Consequently, accurate visualization of the patient's left atrium promises to substantially improve intervention planning. We perform the segmentation using …
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Advanced Techniques for Cardiovascular Magnetic Resonance Imaging in Cases of Irregular Motion
… about complex structures such as atria and pulmonary veins. In addition, the visual-isation of fibrotic tissue in the myocardium can be important for treatment planning and assessment. One of the main challenges to obtaining images with a high isotropic resolution is respiratory motion. …
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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 …