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Glossary

Terms

M


Mean arterial pressure
An average of the systolic and diastolic blood pressures (mean arterial pressure = 2/3 diastolic pressure + 1/3 systolic pressure).
Metered-dose inhalers (MDIs)
Devices that deliver medications into the lungs in the form of a powder or liquid spray
Mitral valve
A valve in the heart that separates the left atrium from the left ventricle preventing blood from flowing from the ventricle backwards into the atrium