High blood pressure (HBP) is a serious condition that can lead to coronary heart disease, heart failure, stroke, kidney failure, and other health problems.
"Blood pressure" is the force of blood pushing against the walls of the arteries as
High blood pressure (HBP) is a serious condition that can lead to coronary heart disease, heart failure, stroke, kidney failure, and other health problems.
"Blood pressure" is the force of blood pushing against the walls of the arteries as the heart pumps blood. If this pressure rises and stays high over time, it can damage the body in many ways.
About 1 in 3 adults in the United States has HBP. The condition itself usually has no signs or symptoms. You can have it for years without knowing it. During this time, though, HBP can damage your heart, blood vessels, kidneys, and other parts of your body.
Knowing your blood pressure numbers is important, even when you're feeling fine. If your blood pressure is normal, you can work with your health care team to keep it that way. If your blood pressure is too high, treatment may help prevent damage to your body's organs.
Blood Pressure Numbers
Blood pressure is measured as systolic (sis-TOL-ik) and diastolic (di-ah-STOL-ik) pressures. "Systolic" refers to blood pressure when the heart beats while pumping blood. "Diastolic" refers to blood pressure when the heart is at rest between beats.
- Classification and Epidemiology
- Diagnosis and Evaluation
L Measurement Issues
L Secondary Causes
L Target Organ Damage and Risk Factor Assessment
L Results from Clinical Trials
L General Approach to Therapy and Monitoring
L Nonpharmacologic Treatment Modalities
- Overview of Pharmacologic Treatments
L Calcium Channel Antagonists
L β-Adrenergic Antagonists
L Angiotensin-Converting Enzyme (ACE) Inhibitors
L α1-Adrenergic Receptor Antagonists
- Patient Adherence and Resistant Hypertension
- Special Clinical Situations
L Hypertensive Urgencies and Emergencies
L Hypertension in Long-Term Care Center Residents
You most often will see blood pressure numbers written with the systolic number above or before the diastolic number, such as 120/80 mmHg. (The mmHg is millimeters of mercury - the units used to measure blood pressure.)
Results from cross-sectional studies have shown that blood pressure, particularly systolic blood pressure (SBP), increases with increasing age. No age adjustment is made in setting the threshold value that defines high blood pressure. The classification of blood pressure outlined by the Joint National Committee on Detection, Evaluation, and Treatment of High Blood Pressure (JNC-VI), shown in Table 40.1, is the same for all adults irrespective of age. There were several minor modifications made in the JNC-VI revision of blood pressure classification that have major significance with respect to geriatric hypertension.
The former category of isolated systolic hypertension [i.e., SBP > 160 mmHg and diastolic blood pressure (DBP) < 90 mmHg] was removed. In addition, the conjunction linking the systolic and diastolic blood pressure columns that define each stage was changed from "and" to "or." As a consequence of this new approach to classification and because isolated diastolic hypertension is so uncommon in older individuals, the correct categorization of blood pressure among those above age 60 may be made by using the level of SBP alone in 99% of cases. Thus, the SBP level matters for the purposes of classification. Finally, as is discussed, treatment recommendations are stratified, based in large part on the classification strategy shown... more » »
Often, it is not easy to tell. But there are symptoms people may have.
Approximately 5% of patients with hypertension have specific causes (Table 11-3). The history, examination, and routine laboratory tests may identify such patients. In particular, patients in whom hypertension develops at an early age, those who first exhibit hypertension when over age 50 years, or those previously well controlled who become refractory to treatment are more likely to have secondary hypertension. Causes include renal disease, genetic causes, renal vascular hypertension, primary hyperaldosteronism, Cushing's syndrome, pheochromocytoma, coarctation of the aorta (uncommon), hypertension associated with pregnancy, estrogen use, as well as other causes (eg, hypercalcemia and medications)... more » »
The table below shows normal blood pressure numbers for adults. It also shows which numbers put you at greater risk for health problems.
Categories for Blood Pressure Levels in Adults (measured in millimeters of mercury, or mmHg)
|Normal||Less than 120||And||Less than 80|
|Prehypertension||120 - 139||Or||80 - 89|
|High blood pressure|
|Stage 1||140 - 159||Or||90 - 99|
|Stage 2||160 or higher||Or||100 or higher|
The ranges in the table apply to most adults (aged 18 and older) who don't have short-term serious illnesses.
- Hypertension Etiology & Classification
L Primary (Essential) Hypertension
L Secondary Hypertension
- Complications of Untreated Hypertension
- Hypertension symptoms and signs
- Goals of Hypertension Treatment
- Hypertension Nonpharmacologic Therapy
- Hypertension Drug Therapy
- Developing an Antihypertensive Regimen
- Special Considerations in the Treatment
- Hypertensive Urgencies & Emergencies
L Pharmacologic Management
Risk Factors for High Blood Pressure
Having certain medical conditions can increase your chances of developing high blood pressure. These conditions include
Unhealthy behaviors can also increase your risk for high blood pressure, especially for people who have one of the medical co