Heart rate variability in concussed athletes: A case report using the smartphone electrocardiogram Ernest Lai, BS, Kenny Boyd, MS, David Albert, MD, Mario Ciocca, MD, Eugene H. Chung, MD, MSc, FHRS HeartRhythm Case Reports Volume 3, Issue 11, Pages 523-526 (November 2017) DOI: 10.1016/j.hrcr.2017.08.009 Copyright © 2017 Heart Rhythm Society Terms and Conditions
Figure 1 Time-domain results—RR interval distributions: (A) concussion at rest, (B) concussion postexercise, (C) recovered at rest, and (D) recovered postexercise. HeartRhythm Case Reports 2017 3, 523-526DOI: (10.1016/j.hrcr.2017.08.009) Copyright © 2017 Heart Rhythm Society Terms and Conditions
Figure 2 Frequency-domain results: (A) concussion at rest, (B) concussion postexercise, (C) recovered at rest, and (D) recovered postexercise. The most noticeable change is in high-frequency power (yellow), which was markedly higher in recovery (both at rest and postexercise). EDR = ECG-derived respiration; PSD = power spectral density. HeartRhythm Case Reports 2017 3, 523-526DOI: (10.1016/j.hrcr.2017.08.009) Copyright © 2017 Heart Rhythm Society Terms and Conditions