1 doctor weighed in:

Angina and yawning, is this caused by lack of oxygen?

1 doctor weighed in

In brief: Sort of yes but

Angina is the lack of oxygen in an area of the heart and is due usually to a closure or stricture of an artery.
Yawning is due to less oxygen and might very normal, happening when our respiration is slowed or just before falling asleep, is a normal happening.

In brief: Sort of yes but

Angina is the lack of oxygen in an area of the heart and is due usually to a closure or stricture of an artery.
Yawning is due to less oxygen and might very normal, happening when our respiration is slowed or just before falling asleep, is a normal happening.
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