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Normal range of PR intervals across different mice ages with 2% isoflurane/200 mL/min O2
| P7 (n = 27) | P14 (n = 17) | P21 (n = 16) | P28 (n = 35) | |
|---|---|---|---|---|
| Average PR interval (ms) | 51 | 39 | 38 | 37 |
| Mean ± 2SD (ms) | 38–63 | 30–48 | 28–47 | 39–44 |
| Number of mice | 27 | 17 | 22 | 35 |
