title: Comparison of systolic time interval measurement modalities for portable devices.
abstract: Systolic time intervals (STI) have shown significant diagnostic and prognostic value to assess the global cardiac function. Their value has been largely established in hospital settings. Currently, STI are considered a promising tool for long-term patient follow-up with chronic cardiovascular diseases. Several technologies exist that enable beat-by-beat assessment of STI in personal health application scenarios. A comparative study is presented using the echocardiographic gold standard synchronized with impedance cardiography (ICG), phonocardiography (PCG) and photoplethysmography (PPG). The ability of these competing technologies in assessing the pre ejection period (PEP) and the left ventricle ejection time (LVET) is given a general overview with comparative results.
authors.affiliation: Department of Informatics Engineering, Science and Technology Faculty of the University of Coimbra, Pólo II, Coimbra, Portugal. carvalho@dei.uc.pt
authors.forename: P
authors.initials: P
authors.lastname: Carvalho
authors.forename: R P
authors.initials: RP
authors.lastname: Paiva
authors.forename: R
authors.initials: R
authors.lastname: Couceiro
authors.forename: J
authors.initials: J
authors.lastname: Henriques
authors.forename: M
authors.initials: M
authors.lastname: Antunes
authors.forename: I
authors.initials: I
authors.lastname: Quintal
authors.forename: J
authors.initials: J
authors.lastname: Muehlsteff
authors.forename: X
authors.initials: X
authors.lastname: Aubert
mesh_terms: D000328:Adult; D002307:Cardiography, Impedance / Q000295:instrumentation / Q000379:methods*; D003936:Diagnosis, Computer-Assisted / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory / Q000295:instrumentation / Q000379:methods*; D009200:Myocardial Contraction / Q000502:physiology*; D010701:Phonocardiography / Q000295:instrumentation / Q000379:methods*; D017156:Photoplethysmography / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013599:Systole / Q000502:physiology*; D016277:Ventricular Function, Left / Q000502:physiology*