Sökning: "QRS vector magnitude"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden QRS vector magnitude.

1. 1. Non-invasive prediction of malignant ventricular arrhythmias and mortality in patients with implantable cardioverter-defibrillator

   Författare :Uzma Chaudhry; Kardiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Implantable cardioverter-defibrillator; late gadolinium enhancement cardiovascular magnetic resonance; ischemic cardiomyopathy; non-ischemic dilated cardiomyopathy; Selvester score; QuAReSS; spatial QRS-T angle; QRS vector magnitude; T-wave vector magnitude; idiopathic ventricular fibrillation;

   Sammanfattning : .... LÄS MER

3. 2. On Bundle Branch Block and Acute Myocardial Infarction

   Författare :Gunnar Thor Gunnarsson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Acute myocardial infarction; left bundle branch block; right bundle branch block; diagnosis; prognosis; continuous vectorcardiography;

   Sammanfattning : Studies from the pre-thrombolytic era showed that patients with bundle branch block suffering acute myocardial infarction had worse prognosis compared to patients without bundle branch block. It seems that this difference still exists in the thrombolytic era, at least for short-term mortality. LÄS MER

4. 3. Electrocardiographic Imaging of Myocardial Ischemia, Infarction and Scar: Correlation with SPECT, MRI and Arrhythmias

   Författare :David G Strauss; Lund Klinisk fysiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Electrocardiography; Imaging; Arrhythmias; Ischemia; Infarction; Cardiomyopathy; SPECT; MRI;

   Sammanfattning : This thesis focuses on the development and testing of electrocardiographic (ECG) methods to diagnose and characterize myocardial ischemia, infarction and fibrosis (scar). The goal is to provide improved decision support to physicians regarding the optimal selection of patients for two costly, invasive therapies – percutaneous coronary intervention (PCI) for patients with acute myocardial infarction (MI) and implantable cardioverter defibrillators (ICDs) for patients with heart failure and reduced left ventricular ejection fraction (LVEF). LÄS MER

5. 4. Cardiac muscle injury in children and experimental animals. Reflections in ECG, especially high-resolution electrocardiography

   Författare :Rolf Bennhagen; Lund Pediatrik; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pediatrics; Kardiovaskulära systemet; Cardiovascular system; signal-averaging ECG; ischaemia; cardiac transplantation; Pediatri;

   Sammanfattning : Background and Methods: Signal-averaging ECG (SAECG), a bioelectrical processing method, is a further development of the conventional ECG. SAECG can detect voltage potentials in the microvolt range and provide a noise-reduced determination of QRS duration. Extended frequency spectra can be analysed. LÄS MER

7. 5. 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