Sökning: "pacing"

Visar resultat 21 - 25 av 47 avhandlingar innehållade ordet pacing.

  1. 21. Cardiac memory studies in two human models

    Författare :Liliane Wecke; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Cardiac memory; repolarization; pacing; WPW ablation;

    Sammanfattning : Background: Cardiac memory is a form of electrical remodeling of the ventricles, where the T vector follows ("remembers') a previously altered QRS vector. On the electrocardiogram (ECG), it presents as T-wave inversions. LÄS MER

  3. 22. "Vi måste takta!" : En studie av organisering för samverkan

    Författare :Marie Mörndal; Anette Hallin; Peter Dobers; Johan Berlin; Mälardalens högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; takta; samverkan; gränsöverskridande; praktik; organisering; industriell ekonomi och organisation; Industrial Economics and Organisations;

    Sammanfattning : Organizational collaboration is perceived as a positive phenomenon in the public sector and is often seen as a way of facing societal challenges despite limited resources. This positive view on organizational collaboration seems to persist, although research shows that collaborative projects bring various difficulties. LÄS MER

  4. 23. Atrial Conduction and P-wave Characteristics: From histology to electrophysiology

    Författare :Yan Huo; Kardiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Atrial fibrillation; Sinus rhythm; Histology; Electrophysiology; Human; P-wave Morphology; Variability of P-wave morphology; P-wave duration;

    Sammanfattning : P-wave morphology reflects the projection of the depolarization vector on the electrocardiogram (ECG)lead axes in three-dimentional space and reflects both right and left atrial activation. The main purpose of current thesis was to explore the internal logic between the atrial conduction properties, including intra- and inter- atrial conduction, and P-wave characteristics from the level of histology to electrophysiology. LÄS MER

  5. 24. Electromechanical effects and optimization modalities of cardiac resynchronization therapy

    Författare :Cinzia Valzania; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Cardiac resynchronization therapy; coronary blood flow; dyssynchrony; echocardiography; exercise; heart failure; hemodynamics; intracardiac electrogram; intracardiac impedance; optimization;

    Sammanfattning : Background and aims: Heart failure is a major health care problem, with high morbidity and mortality rates. In recent years, cardiac resynchronization therapy (CRT) has become an established additive treatment for patients with advanced heart failure, left ventricular (LV) dysfunction, and wide QRS complex. LÄS MER

  7. 25. Adaptation of ventricular repolarization to heart rate change in humans

    Författare :Karl-Jonas Axelsson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cardiac memory; hysteresis; long QT syndrome; QT adaptation; vectorcardiography; ventricular repolarization;

    Sammanfattning : Background: Life-threatening cardiac rhythm disturbances and sudden death are common manifestations of heart disease. Disturbances in electrical recovery (ventricular repolarization; VR) are important mechanisms behind ventricular arrhythmias, which often occur in relation to changes in heart rate (HR). LÄS MER