Sökning: "Heart valves"

Visar resultat 1 - 5 av 22 uppsatser innehållade orden Heart valves.

  1. 1. The functional anatomy of the crocodilian heart

    Kandidat-uppsats, Linköpings universitet/Biologi

    Författare :Jennifer Karlsson; [2023]
    Nyckelord :Anatomy; Cardiac right-to-left shunt; Cog-teeth-like valves; Crocodilian heart; Foramen of Panizza; Hemodynamics; Left aorta;

    Sammanfattning : Crocodiles are ectothermic, intermittent breathing reptiles with low metabolic rates. Additionally, they are diving animals that can stay submerged for long periods, which poses special demands on their cardiovascular system. The crocodilian heart is four-chambered with completely separated ventricles, making it unique among other reptiles. LÄS MER

  3. 2. Physiology-Guided Machine Learning for Improved Reliability of Non-Invasive Assessment of Pulmonary Hypertension

    Master-uppsats, Linköpings universitet/Avdelningen för medicinsk teknik

    Författare :Frida Hermansson; [2023]
    Nyckelord :Pulmonary Hypertension; pulmonary hypertension; improving; physiological-guided; machine learning; neural networks; NN; artificial neural networks; non-invasive; PH; tricuspid regurgitation; peak tricuspid regurgitation velocity; tricuspid regurgitation velocity; right ventricular systolic pressure; VGG16; Unet; TR-CNN; CNN; pulmonell hypertension; förbättra; fysiologisk-guidning; neurala nätverk; trikuspidal regurgitation; maximal trikuspidal regurgitation; icke-invasivt;

    Sammanfattning : Diagnosing pulmonary hypertension (PH) with right heart catheterization (RHC) is associated with a risk for complications and high expenses, leading to late diagnoses [1]. Transthoracic echocardiography can be used to assess non-invasive indicators for PH such as right ventricular systolic pressure (RVSP), which can be estimated by combining the peak tricuspid regurgitation velocity (TRV) with the estimated right arterial pressure (RAP). LÄS MER

  4. 3. Mitralisregurgitation hos australian kelpie : myxomatös mitralisklaffsjukdom eller annan orsak?

    Master-uppsats, SLU/Dept. of Clinical Sciences

    Författare :Eddie Leão Sjöblom; [2023]
    Nyckelord :Myxomatös klaffsjukdom; MMVD; mitralisregurgitation; australian kelpie; blåsljud; LVIDD;

    Sammanfattning : Myxomatös mitralisklaffsjukdom (MMVD) är en förvärvad hjärtsjukdom som är vanlig bland hundar, särskilt hos mindre raser såsom cavalier king charles spaniel, taxar och toyraser. Sjukdomen leder till en förtjockning och prolaps av klaffarna, vanligtvis mitralisklaffen, som börjar läcka blod från kammaren till förmaket (mitralisregurgitation). LÄS MER

  5. 4. Designing a bioreactor to test mechanical properties of decellularized heart valves

    Kandidat-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Viktor Börjesson; Oskar Gögelein; [2023]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Aortic valvular disease is a severe ailment that causes great suffering and many deaths worldwide. The exponentially increasing prevalence of the disease has accelerated the demand of a new functioning valve prosthesis. A new approach is to decellularize homograft heart valves, which has demonstrated promising results in clinical trials. LÄS MER

  7. 5. Boundary conditions in left ventricle for simulating mitral valve regurgitation

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Théo Cyril Arvid Monpouet Ekeram; Ellen Mattsson; [2023]
    Nyckelord :;

    Sammanfattning : Since various kinds of cardiovascular diseases are the leading cause of death today, it is of great importance to further our understanding of not only the diseases themselves, but also different treatments. One of the emerging tools is computational fluid dynamics. LÄS MER