MOESM1 of A new approach for analysis of heart rate variability and QT variability in long-term ECG recording
Creators: name: Hau-Tieng Wu
name: Elsayed Soliman
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1: Figure S1. The ConceFT results of the second case. Top: the time-varying power spectrum (tvPS) of different time series related to the inverse of the RRI; bottom: the tvPS of different time series related to the QTc. The tvPS of the RRI shows an oscillatory pattern. For Rhour,0.99, we found a 2 Hz oscillation around day 4 to day 9, which comes from the regular spikes indicated by the red arrows. Note that the curve around 4 Hz is the multiple of the 2 Hz oscillation due to the spiky shape of the oscillation. For Rhour,0.5 and Rhour,0.01, we could visualize a dominant line at 1 Hz after day 7, which is indicated by the blue arrow. Note that the oscillation could also be visualized in Rhour,0.5 and Rhour,0.01. The different behaviour of Rhour,0.99, Rhour,0.5 and Rhour,0.01 comes from the fact that they capture different physiological information. The QTc time series has a more complicated structure. Actually, it is not easy to recognize any line/curve that lasts long enough, except the 1 Hz oscillation from day 7 to day 10 in Qhour,0.5 indicated by the green arrow. Figure S2. The spectrogram results of the second case for a comparison. Figure S3. The ConceFT results of the third case. Top: the time-varying power spectrum (tvPS) of different time series related to the inverse of the RRI bottom: the tvPS of different time series related to the QTc. The tvPS of the RRI shows an oscillatory pattern. For Rhour,0.99, we found a 1 Hz oscillation from day 2 to day 8, which reflects the oscillatory pattern in the signal indicated by the red arrows. The line around 1 Hz gets stronger in Rhour,0.5 and Rhour,0.01, which is indicated by the blue and green arrows. The QTc time series has an oscillatory pattern that could be confirmed by the line around 1 Hz. However, the 1 Hz oscillation is not very stable in Qhour,0.99 and Qhour,0.5, since the line around 1 Hz is fluctuating. Compared with Qhour,0.99 and Qhour,0.5, Qhour,0.01 has a more stable 1 Hz oscillation, but only before day 13. Figure S4.The spectrogram results of the third case for a comparison. Figure S5. The ConceFT results of the fourth case. Top: the time-varying power spectrum (tvPS) of different time series related to the inverse of the RRI bottom: the tvPS of different time series related to the QTc. The tvPS of the RRI shows an oscillatory pattern. For Rhour,0.99, we found a 2 Hz oscillation around day 5 to day 8 indicated by the red arrow, which come from the regular spikes indicated by the red dash arrow. For Rhour,0.01, we could visualize a dominant line at 1 Hz before day 9 that fluctuates up to 1.5 Hz from day 9 to day 12. The curve indicated by the green arrow. The QTc time series has a more complicated structure and no line/curve could be recognized from the tvPS. Figure S6. The spectrogram results of the fourth case for a comparison.