Search for dissertations about: "Electrogram"

Found 5 swedish dissertations containing the word Electrogram.

  1. 1. Detection and Classification in Electrocardiac Signals

    University dissertation from Department of Electroscience, Lund University

    Author : Magnus Åström; Lund University.; Lunds universitet.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal processing; morphology classification; QRS detection; ischemia; body position changes; electrogram; ECG; electrocardiogram; clustering; classification; Detection; sensing;

    Abstract : Signal processing can be used to condition medical signals to facilitate their interpretation, and to extract clinically important information. The purpose of the present doctoral thesis is to put forward solutions to certain problems encountered in the processing of electrocardiac signals. READ MORE

  2. 2. Spatial Characterization and Estimation of Intracardiac Propagation Patterns During Atrial Fibrillation

    University dissertation from Department of Electroscience, Lund University

    Author : Ulrike Richter; Lund University.; Lunds universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrogram; Atrial Fibrillation; Propagation Pattern Analysis; Biomedical Signal Processing;

    Abstract : This doctoral thesis is in the field of biomedical signal processing with focus on methods for the analysis of atrial fibrillation (AF). Paper I of the present thesis addresses the challenge of extracting spatial properties of AF from body surface signals. READ MORE

  3. 3. Studies on malignant ventricular tachyarrhythmias and their treatment with an implantable defibrillator

    University dissertation from Department of Electroscience, Lund University

    Author : Bengt Sandstedt; Göteborgs universitet.; Gothenburg University.; [2004]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Implantable cardioverter defibrillator; ventricular fibrillation; ventricular tachycardia; predischarge test; defibrillation threshold; discrimination; electrogram morphology; aortic stenosis; hypertrophy; noradrenalin;

    Abstract : Aims: To investigate the hemodynamic, metabolic and autonomic effects of ventricular fibrillation per se during maintained circulation. To study the defibrillation threshold (DFT) and efficacy of a new and thinner ICD lead (DSP) compared with the standard lead (C). READ MORE

  4. 4. Electromechanical effects and optimization modalities of cardiac resynchronization therapy

    University dissertation from Stockholm : Karolinska Institutet, Department of Medicine

    Author : Cinzia Valzania; Karolinska Institutet.; Karolinska Institutet.; [2009]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cardiac resynchronization therapy; coronary blood flow; dyssynchrony; echocardiography; exercise; heart failure; hemodynamics; intracardiac electrogram; intracardiac impedance; optimization;

    Abstract : 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. READ MORE

  5. 5. Focal atrial tachycardia Insights concerning the arrhythmogenic substrate based on analysis of intracardiac electrograms and inflammatory markers

    University dissertation from Linköp : Linköping University Electronic Press

    Author : Ioan Liuba; Gerhard Hindricks; [2009]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICINE; MEDICIN;

    Abstract : Background: Focal atrial tachycardias are tachycardias characterized by a radial spread of activation from a discrete area of the atrial myocardium. They account for 10-15% of supraventricular tachycardias and are generally poorly responsive to pharmacological treatment. The pathophysiologic substrate of these arrhythmias remains poorly understood. READ MORE