Influence of Gravitational Offset Removal on Heart Beat Detection Performance from Android Smartphone Seismocardiograms

Seismocardiography (SCG) is a non-invasive method of analyzing and recording cardiovascular vibrations on the chest wall. Mobile devices offer the possibility to monitor cardiac activity. Accelerometers used in such analysis register gravitational offset because the effects of gravity on an object are indistinguishable from acceleration. Our aim is to investigate the influence of gravitational offset removal on heart beat detection from smartphone seismocardiograms.