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… counts to rise, to help you adjust to the lower oxygen levels at high altitudes. Why It Is Done A … counts to rise, to help you adjust to the lower oxygen levels at high altitudes. Why It Is Done A …
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… may mean that the heart muscle is not getting enough oxygen. This is called ischemia. It may happen if the … may mean that the heart muscle is not getting enough oxygen. This is called ischemia. It may happen if the …
Medical tests
… brain function has stopped. It's usually caused by lack of oxygen or blood flow inside the brain. It may happen when a … brain function has stopped. It's usually caused by lack of oxygen or blood flow inside the brain. It may happen when a …
Medical tests
… placenta to make sure that it is giving your baby enough oxygen. Check your baby's health if your baby has not been … placenta to make sure that it is giving your baby enough oxygen. Check your baby's health if your baby has not been …
Medical tests