Sökning: "ventricular depolarization repolarization"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden ventricular depolarization repolarization.

1. 1. Ventricular repolarization in the human heart : effects of pharmacological and non-pharmacological interventions

   Författare :Karolina J. Nowinski; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :QT interval; QT dispersion; PTCA; ischemia; T vector loop; AV junctional RF ablation; arrhythmia; sex hormones; hormone replacement therapy; cardiac memory ECG; signal-averaged ECG;

   Sammanfattning : Ventricular arrhythmias is the main cause of sudden cardiac death. A prolonged repolarization might cause such arrhythmias, and an increased understanding about mechanisms is therefore important for their primary and secondary prevention. LÄS MER

3. 2. T-vector and T-loop morphology analysis of ventricular repolarization in ischemic heart disease

   Författare :Aigars Rubulis; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Background: Sudden cardiac death (SCD) is responsible for about half of all cardiovascular deaths in the western world. Heterogeneous ventricular repolarization (VR) is a common denominator in the genesis of malignant ventricular arrhythmias responsible for SCD and the presence of coronary artery disease (CAD) is an aggravating factor. LÄS MER

4. 3. Applications of Vectorcardiography for Diagnosis and Risk Stratification in Subpopulations at Risk for Life-Threatening Arrhythmias

   Författare :Daniel Cortez; Kardiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Vectorcardiography; atrial depolarization; ventricular depolarization repolarization;

   Sammanfattning : Introduction: Vectorcardiography, or 3-dimensional electrocardiography is a tool which can be used to identify subtle changes in the electrical forces of the heart, and which can be applied to atrial depolarization, ventricular depolarization and ventricular repolarization for prognostic and diagostic purposes. Methods: Kor’s regression-related and quasi orthogonal methods was used to derive vectorcardiographic parameters from the 12-lead electrocardiogram and applied to a cohort of cryptogenic stroke patients to assess atrial fibrillation, hypertrophic cardiomyopathy patients to assess for ventricular arrhythmias, applied with right-precordial directed quasi orthogonal method to arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVC/D) patients for diagnosis, and applied to ventricular repolarization only to patients with genotype-positive/phenotype-negative Long QT2 syndrome (KNCH2 mutation) to assess for cardiac events. LÄS MER

5. 4. Novel approaches using electrocardiographic imaging for early detection of ARVC in patients and relatives and symptoms preceding sudden death

   Författare :Varvara Kommata; Carina Blomström-Lundqvist; Elena Sciaraffia; Domenico Corrado; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Arrhythmogenic Right Ventricular Cardiomyopathy; diagnosis; gene carriers; body surface mapping; electrocardiographic imaging; sudden cardiac death; Cardiology; Kardiologi; Cardiology; Kardiologi;

   Sammanfattning : Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC) is an inherited disease of the myocardium, predominantly affecting the right ventricle (RV). Arrhythmias are common among patients with the disease and Sudden Cardiac Death (SCD) can occur even in early stages. LÄS MER

7. 5. 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