Fig. 1
Changes in SDNN, SDANN and mean heart rate before and after closure at different ages. Significance levels: NS, no significance; *P < 0.05, **P < 0.01, ***P < 0.001
Fig. 1 | BMC Cardiovascular Disorders
Changes in SDNN, SDANN and mean heart rate before and after closure at different ages. Significance levels: NS, no significance; *P < 0.05, **P < 0.01, ***P < 0.001