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Heart rate estimation on a beat-to-beat basis via ballistocardiography - a hybrid approach
David Friedrich1, Xavier L Aubert, Hartmut Fuhr
1Philips Research Europe, Lehrstuhl für Bildverarbeitung, Sommerfeldstr. 24, 52074 Aachen, Germany. David.Friedrich@RWTH-Aachen.de
Abstract:
We present an algorithm for obtaining the heart rate from the signal of a single, contact-less sensor recording the mechanical activity of the heart. This vital parameter is required on a beat-to-beat basis for applications in sleep analysis and heart failure disease management. Our approach bundles information from various sources for first robust estimates. These estimates are further refined in a second step. An unambiguous comparison with the ECG RR-intervals taken as reference is possible for 98.5% of the heart beats. In these cases, a mean absolute error of 17 ms for the inter-beat interval lengths has been achieved, over a test corpus of 20 whole nights.
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