![]() This is represented by the second number. Diastolic is the pressure in the artery when the heart is relaxing and being filled with blood.Systolic is the pressure in the artery as the heart contracts (squeezes).It is given as 2 figures highest (systolic) over lowest (diastolic). Your blood pressure is a measurement taken of the highest reading and the lowest reading. ![]() When the heart is relaxed, the pressure is lower. When the heart squeezes blood into the arteries, the pressure goes up. Related information on Australian websitesĪs blood is pumped by the heart around the body, the pressure with which it pushes against the walls of blood vessels changes.What is a healthy or ‘normal’ blood pressure?.What is low blood pressure (hypotension)?. ![]()
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