Every time your breathing pauses in sleep, your oxygen dips — and your heart pays the bill.
The short version
- Breathing pauses cause oxygen dips; your body responds with stress hormones and blood-pressure spikes.
- “Hypoxic burden” measures the total low-oxygen strain your body absorbs each night — depth and duration together.
- Our reports track your hypoxic burden every night, because it’s one of the best clues to long-term heart health.
The nightly stress test you never signed up for
When oxygen falls, your body sounds an internal alarm: adrenaline surges, blood pressure spikes, your heart races. A few alarms a night is manageable. Dozens every hour, every night, for years — that’s a load your heart and blood vessels feel. Untreated sleep-disordered breathing is linked to high blood pressure, heart disease, and stroke risk.
Taking two or three blood pressure pills?
Here is a number most people never hear. In a study of patients whose blood pressure stayed high on three or more medications, 83% had sleep apnea — 96% of the men. Sleep apnea is the most common hidden cause of blood pressure that won’t come down, ahead of hormone and kidney problems. The reason is the same oxygen stress described above: each dip at night tightens blood vessels and keeps the body’s alarm system switched on, so the pressure resists the pills.
If you need several medicines to hold your pressure, the odds are better than even that untreated sleep apnea is part of the picture. The ring lets you and your doctor see that strain night by night instead of guessing at it from a stubborn cuff reading.
Source: Logan AG et al., Journal of Hypertension 2001; 19:2271–7.
Why we measure hypoxic burden
Older sleep measures mostly counted events per hour. Hypoxic burden goes further: it captures how deep your oxygen dips go and how long they last — the total strain, not just the count. Research increasingly ties it to cardiovascular outcomes. Every airway.dental/ report includes your oxygen picture in plain language, so you can watch it improve as treatment takes hold.
Worth a conversation?
Worth a conversation? Ask any member of our team about the home sleep test — a simple ring you wear at night, at home. Or request a call-back and we’ll call you.
Stop guessing what snoring does to the heart
Send this instead of a worried phone call. It says it kindly — from a sleep dentist.
What they’ll get — from your phone, not ours:
airway.dental/friend
airway.dental/friend
Or screenshot this and text it — the code scans from a photo.
You can edit it before it goes.
This page is for education only. It is not a diagnosis. Dr. Bishara will review any test results and your options with you personally.