Sökning: "Conduction mechanisms"

Visar resultat 1 - 5 av 68 avhandlingar innehållade orden Conduction mechanisms.

  1. 1. Chronic atrial fibrillation in man. Activation, organisation and characterisation

    Författare :Magnus Holm; Kardiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ECG spectral analysis; Preferential conduction; Organisation; Conduction velocity; Refractoriness; Mechanisms; Activation pattern; Chronic; Fibrillation; Human; Atrium; Open-heart surgery; Cardiovascular system; Kardiovaskulära systemet;

    Sammanfattning : Chronic atrial fibrillation (CAF), with a prevalence progressively increasing with age, is one of the most common cardiac arrhythmias in man and associated with increased morbidity and mortality. Previous studies have shown that, in animals as well as in man, experimental atrial fibrillation is based on different types and dimensions of intra-atrial electrical re-entry. LÄS MER

  3. 2. Conduction Disturbances in Patients with Atrial Fibrillation

    Författare :Eva Hertervig; Kardiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Kardiovaskulära systemet; Cardiovascular system; Pulmonary Vein Potentials; Atrial Fibrillation; Conduction Disturbances;

    Sammanfattning : Background: The electrophysiological mechanisms underlying atrial fibrillation (AF) are incompletely understood. Experimental studies have shown that remodelling of the atrial myocardium is linked to the occurrence and perpetuation of AF. LÄS MER

  4. 3. Mechanisms of excitability in the central and peripheral nervous systems : Implications for epilepsy and chronic pain

    Författare :Jenny Tigerholm; Erik Fransén; Dieter Jaeger; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dendritic excitability; synchronized synaptic input; multicompartment model; epilepsy; axonal excitability; silent C–fibres; Hodgkin–Huxley dynamics; conduction velocity; KA;

    Sammanfattning : The work in this thesis concerns mechanisms of excitability of neurons. Specifically, it deals with how neurons respond to input, and how their response is controlled by ion channels and other active components of the neuron. LÄS MER

  5. 4. Electrical characteristics of SiC powders

    Författare :Eva Mårtensson; KTH; []
    Nyckelord :Field grading; Non-linear; SiC powdeer; Conduction mechanisms; Dielectric properties; Potential barrier; Field emissions;

    Sammanfattning : .... LÄS MER

  7. 5. Thin-Film Electrocatalysts for Polymer Electrolyte Fuel Cells - Activity, Durability and Proton Conduction

    Författare :Björn Wickman; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nafion; thin film evaporation; PEMFC; platinum; titanium oxide; cathode; fuel cell; oxygen reduction reaction; electrocatalyst; proton conduction; model systems;

    Sammanfattning : The polymer electrolyte membrane fuel cell (PEMFC) is a potential technology for future energy conversion in sustainable energy systems. By using hydrogen from renewable energy sources and oxygen from the air, the fuel cell produces electricity with water as the only exhaust. LÄS MER