1. A 48-Year-Old Athletic Man With Bradycardia During Sleep
Sunjeet Kaur, MD, Zahreddin Alsheikhtaha, MBBS, RPSGT, Reena Mehra, MD, FCCP 
CHEST 
Volume 154, Issue 5, Pages e139-e142 (November 2018)
DOI: /j.chest
Copyright © 2018 American College of Chest Physicians Terms and Conditions

2. Figure 1
This 30-s tracing of rapid eye movement sleep demonstrates an abnormal rhythm (red arrow), which is concordant with a hypopnea event (black arrow) associated with an EEG arousal (yellow arrow).
CHEST  , e139-e142DOI: ( /j.chest )
Copyright © 2018 American College of Chest Physicians Terms and Conditions

3. Figure 2
This 120-s recording demonstrates a period of rapid eye movement sleep during which there were rhythm abnormalities on the lead II ECG (red arrow). These abnormalities are temporally related to respiratory events (navy blue arrow) in the absence of significant hypoxia via oximetry monitoring but in the presence of an EEG arousal (yellow arrow).
CHEST  , e139-e142DOI: ( /j.chest )
Copyright © 2018 American College of Chest Physicians Terms and Conditions