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 7 of 7 for “"Conduction delay"”.
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A modeling study of the history-dependence of conduction delay in unmyelinated axons
Conduction delay in an axon is the time required for an action potential to propagate between two positions. It is a function of the axon's passive membrane properties, voltage-gated ion channels and the Na+/K+ pump, and can be substantially affected by neuromodulators. The conduction delay of …
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The electrophysiology of the atrioventricular node in normal and failing rabbit hearts
Conduction abnormalities affect prognosis in chronic heart failure (CHF). Previous investigators have observed abnormal delay in atrioventricular (AV) conduction in a rabbit model of left ventricular dysfunction (LVD) due to apical myocardial infarction. In this model, AV conduction time increased …
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Adjuncts to the Conventional 12-Lead ECG: Assessment of High-Frequency QRS Components and Additional Leads
… In Study III, patients with intraventricular conduction delay had lower HF-QRS in leads with a positive electrode facing the area of the heart with the conduction delay. In areas of the heart with normal conduction velocity, the amplitudes of HF-QRS were normal or almost normal. These findings …
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Investigating the coordination of cardiac conduction and repolarization in ventricular myocardium
Aberrations in conduction or repolarization are established prerequisites for arrhythmogenesis. The following dissertation investigates how reducing either ephaptic (EpC) or gap junctional (GJ) coupling between cardiomyocytes can modulate cardiac conduction, repolarization, or the relationship …
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Secundum atrial septal defect in the adult. Clinical, haemodynamic and electrophysiological aspects.
… atrial sizes, suggesting atrial conduction delay which seems more or less irreversible in middle-aged ASD patients. The remodelling potential and its speed were investigated by repeated echocardiograms before and during the 1st year after ASD closure (IV). Right ventricular and …
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Molecular mapping of the rabbit atrioventricular node
… of the heart is responsible for the important conduction delay between atrial systole and ventricular systole. The anatomical architecture and functional properties of the AVN are complex. Ionic currents have been characterised in the AVN at both the whole tissue level and single cell level. …
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A Comprehensive Evaluation of Cardiac Electro-Anatomic Mapping Using Body Surface Potentials
… defined both by large ST-segment elevation and conduction delay over the ischaemic tissue. However, the inverse model was unable to resolve fine spatial or temporal details of ischaemia in epicardial potentials or activation maps. Despite this, the general pattern of macro-reentrant circuits …