The blood pressure is
expressed as a ratio (Example – 120/80) The first number is Systolic
pressure, or the pressure when the heart pushes blood out of the arteries. The
machine also measures your heart rate on this occasion as you can see it reads
at 84bpm which is fine.
second number is Diastolic (DY-UH-STAH-LIK) pressure, or the pressure when the
bottom number ie 100 measures the amout of oxygen that is in your body this is
done by placing a small device on your finger, 100%