Revisiting QRS Detection Methodologies for Portable, Wearable, Battery-Operated, and Wireless ECG Systems Elgendi, Mohamed ; Eskofier, Björn ; Dokos, Socrates ; Abbott, Derek Abstract Publication: PLoS ONE Pub Date: January 2014 DOI: 10.1371/journal.pone.0084018 Bibcode: 2014PLoSO...984018E