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.

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Defibrillator

An electronic device that helps reestablish normal contraction rhythms in a malfunctioning heart.

Diabetes

The inability of the body to produce or respond properly to insulin. The body needs insulin to convert sugar and starch into the energy needed in daily life. The full name for this condition is diabetes mellitus; defined as a fasting blood glucose of 126 mg/dL or more measured on two occasions.

Diastolic Blood Pressure

The lowest blood pressure measured in the arteries, it occurs when the heart muscle relaxes between beats. In a typical blood pressure reading, such as 120/78, the lower number is diastolic blood pressure.

Diuretic

A drug that increases the rate at which urine forms by promoting the excretion of water and salts. It’s used to treat high blood pressure, congestive heart failure and some congenital heart defects.

Doppler Ultrasound

A test that uses high-frequency sound waves to detect blockages in an artery.