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- W2912056610 abstract "Force-interval relationships (FIRs) of the heart represent the relationships between inter-beat intervals (IBIs) strength of the ventricular contractions. These relationships are typically measured invasively are altered from normal in heart failure (HF). An unobtrusive continuous measurement of FIRs could be beneficial when HF atrial fibrillation (AF) coexist in order to understand if AF causes progression of HF. We hypothesize that FIRs could be assessed during AF with IBIs hemodynamic changes captured unobtrusively by photo-plethysmography (PPG) at the wrist. FIRs were assessed by using Spearman's rank correlation between the pulse onset change in the PPG waveform either the preceding or pre-preceding IBIs $(r_{pre} and r_{pre-pre})$ in 5-minute segments. 32 patients (14 continuous AF, 18 no AF) were measured during the night with PPG electrocardiography as a reference. The mean standard deviation of $r_{pre}$ were $-0.25pm 0.08$ $0.05pm 0.12(p , of $r_{pre-pre} 0.60pm 0.09$ $0.16pm 0.14 (p , during AF sinus rhythm, respectively. Areas under the Receiver Operating Characteristics curve were 0.987 0.998, respectively. Thus, during AF the IBIs correlate with the beat-to-beat changes of blood volume measured with PPG, likely to indicate that FIRs can be measured unobtrusively with the PPG signal." @default.
- W2912056610 created "2019-02-21" @default.
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- W2912056610 date "2018-12-30" @default.
- W2912056610 modified "2023-09-23" @default.
- W2912056610 title "Force-Interval Relationships of the Heart Measured With Photoplethysmography During Atrial Fibrillation" @default.
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- W2912056610 doi "https://doi.org/10.22489/cinc.2018.111" @default.
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