ReliOn HEM-412CREL Instruction Manual | Page 7

ReliOn Blood Pressure Monitor Instruction Manual - HEM-412CREL.
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7

A FEW WORDS ABOUT BLOOD PRESSURE

Blood pressure is the force on the walls
of your blood vessels as blood flows
through them.

Your heart is like a pump. When 
it contracts, or beats, it sends a surge 
of blood through the blood vessels 
and pressure increases. This is called 
your systolic pressure.

When your heart relaxes between 
beats, your blood pressure decreases.
This is called your diastolic pressure.

When a doctor takes your blood 
pressure, he or she measures 
both your systolic and diastolic 
pressures and records them as 
numbers. For example, if your blood 
pressure reading is 120/76 (120 over
76), your systolic is 120 and your 
diastolic is 76. The numbers are 
expressed in millimeters of mercury 
120/76 mmHg.

Heart Contracts
(Pressure Increases)

Heart Relaxes
(Pressure Decreases)

Systolic
(Upper Number)

Diastolic
(Lower Number)

HEM-412CREL-IM-3619  3/11/03  11:22 AM  Page 7

 

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