• 06 DEC 16
    • 0
    Understanding Blood Pressure Readings

    Understanding Blood Pressure Readings

    What do your blood pressure numbers mean?
    The only way to know (diagnose) if you have high blood pressure (HBP or hypertension) is to have your blood pressure tested. Understanding your blood pressure numbers is key to controlling high blood pressure.

    Healthy and unhealthy blood pressure ranges
    Learn what’s considered normal, as recommended by the American Heart Association.

    Blood Pressure
    Category
    Systolic
    mm Hg (upper #)
    Diastolic
    mm Hg (lower #)
    Normal less than 120
    and less than 80
    Prehypertension 120139
    or 8089
    High Blood Pressure
    (Hypertension) Stage 1
    140159
    or 9099
    High Blood Pressure
    (Hypertension) Stage 2
    160 or higher or 100 or higher
    Hypertensive Crisis
    (Emergency care needed)
    Higher than 180
    or Higher than 110

    Blood pressure categories
    The five blood pressure ranges as recognized by the American Heart Association are:

    • Normal blood pressure
      Congratulations on having blood pressure numbers that are within the normal (optimal) range of less than 120/80 mm Hg. Keep up the good work and stick with heart-healthy habits like following a balanced diet and getting regular exercise.
    • Prehypertension (early stage high blood pressure)
      Prehypertension is when blood pressure is consistently ranging from 120-139/80-89 mm Hg. People with prehypertension are likely to develop high blood pressure unless steps are taken to control it.
    • Hypertension Stage 1
      Hypertension Stage 1 is when blood pressure is consistently ranging from 140-159/90-99 mm Hg. At this stage of high blood pressure, doctors are likely to prescribe lifestyle changes and may consider adding blood pressure medication.
    • Hypertension Stage 2
      Hypertension Stage 2 is when blood pressure is consistently ranging at levels greater than 160/100 mm Hg. At this stage of high blood pressure, doctors are likely to prescribe a combination of blood pressure medications along with lifestyle changes.
    • Hypertensive crisis
      This is when high blood pressure requires emergency medical attention. If your blood pressure is higher than 180/110 mm Hg and you are NOT experiencing symptoms such as chest pain, shortness of breath, back pain, numbness/weakness, changes in vision or difficulty speaking, wait about five minutes and take it again. If the reading is still at or above that level, you should CALL 9-1-1 and get help immediately. Learn more about the two types of hypertensive crises.

    Your blood pressure numbers and what they mean
    117 over 76 millimeters of mercuryYour blood pressure is recorded as two numbers:

    • Systolic blood pressure (the upper number) — indicates how much pressure your blood is exerting against your artery walls when the heart beats.
    • Diastolic blood pressure (the lower number) — indicates how much pressure your blood is exerting against your artery walls while the heart is resting between beats.

    Which number is more important?
    Typically, more attention is given to systolic blood pressure (the top number) as a major risk factor for cardiovascular disease for people over 50. In most people, systolic blood pressure rises steadily with age due to the increasing stiffness of large arteries, long-term build-up of plaque and an increased incidence of cardiac and vascular disease. However, elevated systolic or diastolic blood pressure alone may be used to make a diagnosis of high blood pressure. And, according to recent studies, the risk of death from ischemic heart disease and stroke doubles with every 20 mm Hg systolic or 10 mm Hg diastolic increase among people from age 40 to 89.


    Why blood pressure is measured in mm Hg
    The abbreviation mm Hg means millimeters of mercury. Why mercury? Mercury was used in the first accurate pressure gauges and is still used as the standard unit of measurement for pressure in medicine.

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