https://www.researchgate.net/publication/43296515_False_arrhythmia_alarm_suppression_using_ECG_ABP_and_photoplethysmogram (Any fulltext)
Deshmane, A. (2009). False arrhythmia alarm suppression using ECG, ABP, and photoplethysmogram. PhD Thesis, Massachusetts Institute for Technoloy, Cambridge, MA, USA.