Case Report
Causal Link between Ventricular Ectopy and Concussion
Table 2
Heart rate and heart rate variability (HRV) data from the 24-hour Holter monitor from April 2013 to October 2018.
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The two concussions (mTBI) are dated in the table. No HRV data were available on 4-11-2013. ASDNN = average of the standard deviations of all R-R intervals for all 5 min segments in the 24 h recordings; SDANN = standard deviation of all averaged normal sinus R-R intervals for all 5 min segments in the 24 h recordings; SDNN = standard deviation of all normal sinus R-R intervals in the entire 24 h recording. Ultra-low frequency (ULF), 0–0.003 Hz; very low frequency (VLF), 0.003–0.04 Hz; low frequency (LF), 0.04–0.15 Hz; high frequency (HF), 0.15–0.4 Hz; and total frequency (TF), 0–0.5 Hz. |