Skip to content
PulseOx
Tracker
Pricing
Free tools
Blog
Help
Live demo
Log in
Get started
Help center
/
Understanding your data
Browse help topics
Getting started
Connect your Checkme O2 Max over Bluetooth
Run your first sync
Import CSV exports
Understanding your data
Reading the overnight chart
Overnight analysis metrics
Heart rate and CVHR
Features
Tagging nights with events
Comparing sessions
Sleep timing analysis
Understanding your data
Read the overnight chart and make sense of every metric.
Reading the overnight chart
How to read the dual-axis SpO₂ and heart-rate trace for a night.
Overnight analysis metrics
ODI, desaturation events, time-below thresholds, and severity badges explained.
Heart rate and CVHR
What cyclic variation of heart rate tells you about your night.