Skip to main content

Advertisement

Table 1 ECG indices in developing neonatal mice

From: Development of electrocardiogram intervals during growth of FVB/N neonate mice

Parameter PND2 PND4 PND6 PND8 PND10 PND12 PND14
n = 17 20 20 20 20 20 20
HR (bpm) 424 ± 62 475 ± 59 525 ± 69 583 ± 46 594 ± 74 666 ± 25 713 ± 35
HRVar (ms) 3.2 ± 2.6 4.2 ± 4.3 12.4 ± 14.4 11.3 ± 10.5 16.5 ± 13.6 19.9 ± 10.5 18.0 ± 12.9
PR (ms) 45.3 ± 7.9 37.5 ± 5.8 31.9 ± 4.5 27.8 ± 2.4 28.3 ± 5.7 25.3 ± 1.3 24.3 ± 1.5
QRS (ms) 14.7 ± 4.1 13.1 ± 3.0 11.9 ± 1.9 10.4 ± 1.2 10.3 ± 1.2 9.8 ± 1.1 8.9 ± 0.8
QTc (ms) 58.0 ± 5.6 54.5 ± 4.7 51.2 ± 4.5 45.5 ± 3.7 45.8 ± 4.7 43.8 ± 2.7 42.6 ± 2.1
pNN6 (ms) 0.4 ± 1.2 3.0 ± 11.7 16.3 ± 30.0 8.0 ± 17.2 13.7 ± 23.1 7.3 ± 11.4 3.1 ± 7.2
  1. Heart rate (HR), heart rate variability (HRVar), PR interval, QRS interval, corrected QT interval (QTc), and percentage of adjacent intervals differing by greater than 6 ms (pNN6) are provided. Values are expressed as mean ± SD.