Diagnostic criteria for high blood pressure:
For adults, Systolic Blood Pressure > 140 mmHg or Diastolic Blood Pressure >90 mmHg, measured at resting in three blood pressure measurements on different dates, instead of occasional blood pressure rises due to emotional turmoil. Once diagnosed with high blood pressure, it is strongly recommended that the patient measure the blood pressure again at home; if your blood pressure turns out normal then, you probably have had what is known as "White Coat Hypertension", i.e., blood pressure elevated upon measurement in a clinic yet remaining normal upon self-measurement at home, which does not require treatment. White coat hypertension accounts for about 10% of any high blood pressure patients, which is a quite high proportion. Some other people may, in contrast, have the blood pressure measurement normal at a clinic but elevated at home; this is called “Anti-White Coat Hypertension”, which is also a type of hypertension requiring intervention. These two examples suggest the importance of home blood pressure monitoring, as it typically better reflects the real blood pressure status.
Classification of high blood pressure for adults
Tip: For the people over 60 years old, SBP can be extended to 150 mmHg.
Hypertension: Blood Pressure >= 150/90 mmHg.
You may be asking, why is systolic blood pressure >= 140 mmHg are high blood pressure, systolic blood pressure in 120 mmHg – 140 mmHg is normal, this number come from?
The hazards of high blood pressure are the damage to the vessel wall by elevated blood pressure, especially the damage to the blood vessels of the heart, brain and kidney, which lead to a series of complications, we called health risks have increased. Systolic blood pressure is 140 mmHg and diastolic pressure is 90 mmHg, what does that mean? This means that the individual reached the blood pressure value, his health risks associated with hypertension has doubled. In other words, he compared people with normal blood pressure, his health risk (risk of cardio-cerebral vascular diseases) increased one time, the one time on this value, the value is 140 mmHg, this has a range, 120 mmHg – 140 mmHg; 80 mmHg – 90 mmHg, there is a high normal. The health risk is increased with the increase of blood pressure. We took a double value, it is just 140 mmHg, so it is used as a diagnostic criterion. Likewise, if your blood pressure between 120 mmHg and 140 mmHg, in the high normal value range, your heart and vascular disease risk is also increased, but there is no more than doubled. If is one time, we will put the points to determine for the diagnosis of hypertension.
The diagnosis value of high blood pressure, is a relative concept? Still an absolute concept? People of different gender, different physical people, people of all ages, and their diagnostic criteria is there any difference?
The answer is: everyone is the same. blood pressure more than 140/90 mmHg or more. they can be diagnosed with high blood pressure. But the blood pressure is related to blood vessels, and blood vessels associated with age. people with increased age, there is a vascular aging process, the aging process is a process of gradual hardening of the blood vessels. Therefore, systolic blood pressure will increase further. For the elderly, our diagnostic criteria is still 140/90 mmHg. for people over the age of 60, we have to further improve the value, because the people of arteriosclerosis, it is not easy to lower blood pressure, So the systolic blood pressure can be extended to 150 mmHg, diastolic pressure is still 90 mmHg.
The higher the blood pressure is, the higher the risk of cardiovascular events
The risk of blood pressure is closely related to the value of blood pressure, especially high blood pressure can lead to bleeding, blood vessel rupture, especially in the brain vascular rupture is very common, we called hemorrhagic stroke. For over 65 years old, more likely to have higher systolic blood pressure, diastolic blood pressure lower, blood pressure differences to further expand, so that the risk of complications of hypertension will be further expanded. There is an index called pulse pressure. systolic blood pressure minus the diastolic blood pressure is the pulse pressure. For example, Normal human blood pressure 120/80 mmHg, pulse pressure is 40 mmHg. But this value in increasing, especially in the elderly numerical increase more apparent, this often means that the hardening of the arteries, means that the increased risk of cardiovascular events.
Stage 1 hypertension:
Systolic blood pressure ranging from 140 to 159 mm Hg or the diastolic blood pressure ranging from 90 to 99 mm Hg.
Within 10 years the probability of cardiac and cerebrovascular diseases in 5%, in other words, 100 people in 10 years there will be 5 people will have a stroke, myocardial infarction and so on.
Stage 2 hypertension:
systolic blood pressure ranging from 160 to 179 mm Hg or the diastolic blood pressure ranging from 100 to 109 mm Hg.
Within 10 years the probability of cardiac and cerebrovascular disease is greater than 10%.
Stage 3 hypertension:
systolic blood pressure more than 180 mm Hg or the diastolic blood pressure more than 110 mmHg
Within 10 years the probability of cardiac and cerebrovascular disease is greater than 15%.
Diagnosis of people with physiological low blood pressure
A person when he was young, his blood pressure is 90 / 60 mmHg, he has physiological hypotension, he in old age, blood pressure is 120 / 80 mmHg, systolic blood pressure increased by 40 mmHg, for normal people, his blood pressure is normal, but we should diagnosis is that he has been suffering from high blood pressure. Although there is no exact value, this value is required to provide their own, when he was young should have a blood pressure record.
Therefore, it is recommended to do a blood pressure measurement every year, so there is blood pressure data, for later diagnosis.
We did a test, we measured the body temperature and blood pressure of 10 healthy people, measured once a day, for a month, we found a strange phenomenon. Each person's basic body temperature and blood pressure are not the same. Some higher, some lower, these values is the basis of blood pressure, basic body temperature. Before people have no high blood pressure, should have blood pressure data records. If your blood pressure is higher than your base blood pressure 40 mmHg, then you are diagnosed with high blood pressure, even at this time, your systolic blood pressure no more than 140 mmHg. If you don't have blood pressure records when you are healthy, so doctors cannot diagnose.
Have a blood pressure record when you are young
You had better keep the blood pressure measurement records when you are young and used the records as the basic blood pressure. So subsequently, you can be diagnosed with hypertension as long as your blood pressure exceeds your basic blood pressure by 40 mmHg (SBP). The precise values are unavailable and you must provide them yourself. If you do not keep the records when you are healthy, then the diagnosis is impossible. For example, the blood pressure of a man was 90/60 mmHg when he was young, and later the blood pressure rose to 135/85 mmHg, with an increase of 40 mmHg (SBP). Then he suffers from High blood pressure, although his blood pressure does not exceed 140 mmHg (SBP).
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