Table 1 Comparison of spontaneous action potentials
From: The mechanism of increased postnatal heart rate and sinoatrial node pacemaker activity in mice
Parameters | Neonate | Adult | P value |
|---|---|---|---|
Beating rate (beats min−1) | 249 ± 10 | 358 ± 19 | 0.0004 |
Overshoot (mV) | 18.6 ± 3.0 | 15.8 ± 6.2 | 0.66 |
Maximal diastolic potential (mV) | −64.9 ± 3.0 | −58.8 ± 2.4 | 0.19 |
Amplitude (mV) | 83.5 ± 4.3 | 74.6 ± 7.9 | 0.31 |
Maximal upstroke velocity (V s−1) | 14.9 ± 3.3 | 21.5 ± 5.6 | 0.31 |
50 % duration (mV) | 51.3 ± 6.4 | 35.1 ± 2.9 | 0.089 |
Diastolic depolarization rate (mV s−1) | 86 ± 7 | 180 ± 20 | 0.0008 |