Table 1 Standard measures of the Poincaré plots of RR and QT intervals represented by min-max, median, and interquartile range (Q1–Q3). The values are obtained over n = 18 ECG samples, and those of IBIs and FPDs of the hiPSC-CM aggregates, obtained over n = 21 IBI and n = 20 FPD time series. p-values are computed using independent two-sample t-test.
From: Scaling and correlation properties of RR and QT intervals at the cellular level
Measures | ECG, RR (n = 18) | hiPSC-CMs, IBI (n = 21) | p-value |
|---|---|---|---|
min-max, median, (Q1–Q3) | min-max, median, (Q1–Q3) | ||
Mean (ms) | 871–1830 | 703–2383 | 0.0207 |
1092 | 1400 | ||
(1044–1232) | (1178–1745) | ||
SD1/SD2 (n.u) | 0.15–0.54 | 0.03–0.98 | 0.749 |
0.28 | 0.28 | ||
(0.22–0.33) | (0.16–0.45) | ||
Pearson’s r (n.u) | 0.55–0.96 | −0.02–1.00 | 0.483 |
0.85 | 0.85 | ||
(0.80–0.91) | (0.67–0.95) | ||
Measures | ECG, QT ( n = 18) | hiPSC-CMs, FPD ( n = 20) | p-value |
min-max, median, (Q1–Q3) | min-max, median, (Q1–Q3) | ||
Mean (ms) | 377–501 | 394–1529 | <0.001 |
419 | 902 | ||
(406–434) | (764–982) | ||
SD1/SD2 (n.u) | 0.21–0.83 | 0.13–0.98 | 0.023 |
0.45 | 0.72 | ||
(0.35–0.67) | 0.53–0.88 | ||
Pearson’s r (n.u) | 0.19–0.92 | −0.15–0.97 | 0.015 |
0.66 | 0.32 | ||
(0.38–0.78) | (0.08–0.56) |
