HYPERTENSION Luo kailiang,MD,Prof. The Second Affiliated Hospital Chongqing University of Medical Sciences
HYPERTENSION Luo kailiang, MD, Prof. The Second Affiliated Hospital Chongqing University of Medical Sciences
1.Definition Hypertension: SBP≥140 or DBP≥90mmHg primary hypertension (essential hypertension):In 95%of cases no cause can be found. Secondary Hypertension: In 5%a cause can be found. 2
2 1. Definition Hypertension: SBP > 140 or DBP > 90mmHg primary hypertension (essential hypertension): In 95% of cases no cause can be found. Secondary Hypertension: In 5% a cause can be found
Definitions and classification of blood pressure level (WHO/ISH,1999) Category SBP(mmHg) DBP(mmHg） Optimal <120 <80 Normal <130 <85 High normal 130~139 85≈89 Grade 1 HPN(mild) 140~159 9099 Grade 2 HPN (morderate) 160~179 100~109 Grade 3 HPN(severe) ≥180 ≥110 ISH ≥140 90
3 Definitions and classification of blood pressure level (WHO/ISH,1999） Category SBP(mmHg) DBP(mmHg) Optimal <120 <80 Normal <130 <85 High normal 130～139 85～89 Grade 1 HPN(mild) 140～159 90～99 Grade 2 HPN(morderate) 160～179 100～109 Grade 3 HPN(severe) ≥180 ≥110 ISH ≥140 <90
When a patient's systolic and diastolic blood pressures fall into different categories,the higher category should apply. Blood pressure is a continuous variable, The definition of hypertension has been arbitrarily set as:That blood pressure above which the benefits of treatment outweigh the risks in term of morbidity and mortality
4 ▪ When a patient’s systolic and diastolic blood pressures fall into different categories, the higher category should apply. ▪ Blood pressure is a continuous variable, The definition of hypertension has been arbitrarily set as: That blood pressure above which the benefits of treatment outweigh the risks in term of morbidity and mortality
A diagnosis of high blood pressure should not be based on a single reading,except when it is extremely high-for example, above 170-180/105-110.Otherwise several measurements taken over a period of time are generally needed to confirm a diagnosis. 5
5 ▪ A diagnosis of high blood pressure should not be based on a single reading, except when it is extremely high—for example, above 170–180/105–110. Otherwise several measurements taken over a period of time are generally needed to confirm a diagnosis