Glossary of Terms

This glossary of terms has been compiled for your reference. Select the first letter of the word you’re searching for to begin.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All


The condition of being significantly overweight. It’s defined as a body mass index (BMI) of 30.0 or greater, or about 30 pounds or more over ideal body weight. Extreme obesity is defined as a BMI of 40.0 or more.

Occluded Artery

An artery in which blood flow has been impaired by a blockage.

Open-Heart Surgery

Surgery performed on the opened heart while the bloodstream is diverted through a heart-lung machine.


Defined as a body mass index (BMI) of 25.0–29.9 kg/m2. A BMI of 25 corresponds to about 10 percent over ideal body weight.