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We studied the mechanisms of spontaneous termination of atrial fibrillation in a biophysical model of human atria, during the eight seconds preceding termination. The earliest detectable changes in the cycle length and the number of wavefronts occurred about three seconds prior to termination. We compared the mechanisms involved in the right and left atrium and investigated the effects of atrial geometry...
This study aims at developing a measure for describing the spatial complexity of atrial signals during atrial fibrillation (AF). A biophysical model of the atria and a volume conductor model of the thorax were used to simulate the atrial electrical activity as expressed on the torso. Features were extracted from the equivalent dipole (VCG) derived from body surface potentials. The robustness of these...
Characterization of electrical signals during atrial fibrillation (AF) is facilitated when the ventricular electrical activity (QRST complexes) has been suppressed. However, evaluating the performance of the QRST cancellation requires knowing the atrial activity during the QRST complex. A biophysically based model of the ECG during AF was developed, in which the exact separate contributions of the...
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