A low-oxygen environment — similar to the thin air found at Mount Everest base camp — can protect the brain and restore ...

Low blood pressure, or hypotension, often goes unnoticed due to symptoms mimicking other conditions. Key signs include ...

TOFPA is a congenital heart defect that makes it difficult for blood low in oxygen to reach your lungs. It may be suspected during pregnancy ultrasounds or detected by signs of low oxygen after birth.

Pulse oximetry is a noninvasive, painless test that measures the oxygen saturation level of your blood. Here’s how it works and what the readings mean.