GC: n

S: http://www.bloodpressureuk.org/BloodPressureandyou/Thebasics/Bloodpressurechart (last access: 13 July 2015); http://www.heart.org/HEARTORG/Conditions/HighBloodPressure/AboutHighBloodPressure/Understanding-Blood-Pressure-Readings_UCM_301764_Article.jsp (last access: 13 July 2015).

N: Blood pressure is typically recorded as two numbers, written as a ratio like this:

• Systolic: The top number, which is also the higher of the two numbers, measures the pressure in the arteries when the heart beats (when the heart muscle contracts).
• Diastolic: The bottom number, which is also the lower of the two numbers, measures the pressure in the arteries between heartbeats (when the heart muscle is resting between beats and refilling with blood).

S: http://www.heart.org/HEARTORG/Conditions/HighBloodPressure/AboutHighBloodPressure/Understanding-Blood-Pressure-Readings_UCM_301764_Article.jsp (last access: 13 July 2015)

SYN:
S:

CR: artery