Automatic detection of atrial fibrillation using wavelet and fractal analysis of RR intervals achieved 100% sensitivity on a patient basis, with beat-to-beat sensitivity up to 99.2%.
Observational (n=80)
Permanent and paroxysmal AF is a risk factor for the occurrence and the recurrence of stroke, which can occur as its first manifestation. However, its automatic identification is still unsatisfactory. In this study, a new mathematical approach was evaluated to automate AF identification. A derivation set of 30 24-hour Holter recordings, 15 with chronic AF (CAF) and 15 with sinus rhythm (SR), allowed the authors to establish specific RR variability characteristics using wavelet and fractal analysis. Then, a validation set of 50 subjects was studied using these criteria, 19 with CAF, 16 with SR, and 15 with paroxysmal AF (PAF); and each QRS was classified as true or false sinus or AF beat. In the SR group, specificity reached 99.9%; in the CAF group, sensitivity reached 99.2%; in the PAF group, sensitivity reached 96.1%, and specificity 92.6%. However, classification on a patient basis provided a sensitivity of 100%. This new approach showed a high sensitivity and a high specificity for automatic AF detection, and could be used in screening for AF in large populations at risk.
Duverney et al. (Mon,) conducted a observational in Atrial Fibrillation (n=80). Automatic detection of AF using wavelet and fractal analysis was evaluated on Sensitivity and specificity of automatic AF identification. Automatic detection of atrial fibrillation using wavelet and fractal analysis of RR intervals achieved 100% sensitivity on a patient basis, with beat-to-beat sensitivity up to 99.2%.
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