As a lifelong health and fitness enthusiast with 15 years of experience, Rachel MacPherson is passionate about cutting through fads and noise. Her aim is to clearly communicate health information with ...

A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s ...

Decreased cardiac output is when your heart can no longer pump enough oxygen to meet the demands of your body. A rapid heart rate is a common symptom, but there are others, too. Your heart is ...

The urgent need for reliable alternatives to traditional blood transfusions has driven global scientific innovation for ...

Cyanotic heart disease refers to a group of heart problems that occur at birth. The condition can cause abnormally low oxygen levels in the blood and lead to a bluish skin color. Congenital heart ...