Search for dissertations about: "pacemaker"

Showing result 11 - 15 of 61 swedish dissertations containing the word pacemaker.

  2. 11. Optimal pacing with and implantable pO2 sensor

    Author : Nils Holmström; KTH; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : A goal in modern pacemaker technology is to adapt the timing of stimulation to the metabolic demand and to optimize the hemodynamics of the diseased heart. Because the plasma concentration of mixed venous oxygen is a good indicator of workload and circulation, we developed an implantable coulometric blood oxygen sensor to improve the rate adaptation. READ MORE

  4. 12. Calcium signaling and network activity : mathematical modeling and molecular mechanisms

    Author : Erik Smedler; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The calcium (Ca2+) ion is a versatile second messenger present in all cells. It is involved in such diverse processes as cell division, differentiation, vesicle transport and muscle contraction. Its widespread applicability is partially explained by its wide temporal and spatial dynamics. READ MORE

  5. 13. Circadian plasticity in the neuromuscular junction of Drosophila melanogaster

    Author : Kerstin Mehnert; Rafael Cantera; Charlotte Helfrich-Förster; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurobiology; Neurobiologi; funktionell morfologi; Functional Zoomorphology;

    Abstract : A biological clock exists in many organisms and controls rhythmic behaviors such as the activity pattern of locomotion. At the cellular level, it has been shown that circadian rhythms in the morphology of neurons exist in the fruit fly Drosophila melanogaster. READ MORE

  6. 14. Implantable devices in heart failure : studies on biventricular pacing and continuous hemodynamic monitoring

    Author : Frieder Braunschweig; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Implantable devices; congestive heart failure; biventricular pacing; hemodynamic monitoring; ambulatory; hospitalizations; positron emission tomography; stress; blood flow; loop diuretics; natriuretic peptides; hemodynamics.;

    Abstract : Chronic heart failure is a highly symptomatic syndrome associated with increasing prevalence, frequent hospital admissions and high treatment costs. Despite recent advances in drug therapy, morbidity and mortality are still high. READ MORE

  7. 15. Continuous ambulatory hemodynamic monitoring with an implantable system : the feasibility of a new technique

    Author : Åke Ohlsson; Karolinska Institutet; Karolinska Institutet; []
    Keywords : heartfailure; hemodynamic monitoring; implantable; oxygen saturation; pressure; ambulatory; right ventricle; dPdt; long-term; sensor; cardiac output.;

    Abstract : Patients with chronic heart failure constitute an increasingly large group. Despite recent therapeutic improvements, these patients have a poor prognosis. READ MORE