Michael Oeff

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The variability of electric and magnetic signals from the heart during the depolarization phase is investigated. A signal processing method is developed, which provides estimates for the beat-to-beat variability of the QRS-complex. The method is based on the decomposition of the depolarization signal into bandpass signals by means of the Morlet wavelet(More)
AIMS The aim of this study was to describe the characteristics of patients with atrial fibrillation (AF) enrolled in the Central Registry of the German Competence NETwork on Atrial Fibrillation (AFNET) and to assess current medical practice in patients treated at various levels of medical care in Germany. METHODS AND RESULTS From February 2004 to March(More)
During a magnetocardiography (MCG) study, a patient was recorded while in atrial fibrillation (AF), and we used this opportunity to conduct a pilot study of the spatial characteristics of the AF signal. Forty nine MCG channels were recorded. Atrial activity was isolated by the selection of a QRST-free section of AF. Fourier analysis identified the frequency(More)
1 Introduction It has been shown that regional disparities of ventricular primary repolarization properties can be reflected in body surface distributions of electrocardiographic QRST deflection areas (integrals) [1-4]. To quantitatively assess complexity of spatial features of QRST-integral distributions, several authors (see, e.g., [2,4] and references(More)
BACKGROUND Anticoagulation using vitamin K antagonists (VKAs) significantly reduces the risk of recurrent stroke in stroke patients with atrial fibrillation (AF) and is recommended by guidelines. METHODS The German Competence NETwork on Atrial Fibrillation established a nationwide prospective registry including 9,574 AF patients, providing the opportunity(More)
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