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When you have high blood pressure, or hypertension, the force of blood against your artery walls is too strong. High blood pressure can damage your arteries, heart, and kidneys, and lead to atherosclerosis and stroke. Hypertension is called a “silent killer” because it does not cause symptoms unless it is severely high and, without your knowing it, causes major organ damage if not treated.
Your blood pressure measurement consists of two numbers: systolic and diastolic.
Millions of people whose blood pressure was previously considered borderline high (130â€“139/85â€“89 mm Hg) or normal (120/80) now fall into the “prehypertension” range, based on new, more aggressive high blood pressure guidelines from the Seventh Report of the Joint National Committee (JNC 7) on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure.
Because new studies show the risk of heart disease and stroke begins to increase at lower blood pressures than previously believed, health experts lowered the acceptable normal range to promote more aggressive and earlier treatment of high blood pressure.
Usually you will not feel any warning signs or symptoms of high blood pressure, and you will not know you have it until a health professional takes a blood pressure reading. Hypertension develops slowly and can cause serious organ damage, usually without any symptoms.
If you develop severe high blood pressure, you may have headaches, visual disturbances, nausea, and vomiting. Malignant high blood pressure (hypertensive crisis), which is hypertension that rises rapidly, can also cause these symptoms. Untreated malignant hypertension can damage the brain, heart, eyes, or kidneys. It is a medical emergency that requires immediate hospitalization.
Over time, if you do not receive treatment for your high blood pressure, you may experience symptoms caused by damage to your heart, kidney, or eyes, including coronary artery disease, stroke, and kidney (renal) failure.
In most cases, a doctor may not be able to pinpoint the exact cause of your high blood pressure. But several factors are known to increase blood pressure, including obesity, heavy alcohol use, family history of high blood pressure, high salt intake, and aging. A sedentary lifestyle, stress, low potassium intake, low calcium intake, and resistance to insulin may also cause your blood pressure to rise.
Several factors increase your risk for high blood pressure. Some of them are lifestyle issues you can control.
Lifestyle issues you can control to lower your risk of developing high blood pressure include obesity and not being active or exercising, drinking alcohol (three drinks a day or more), eating a lot of salty or processed foods, and not getting enough calcium, magnesium, and potassium in your diet.
Risk factors you can’t control include a family history of high blood pressure, your race (being African American increases your risk), and aging. Ninety percent of people who, at age 55, do not have hypertension will eventually develop it.
Most people find out they have high blood pressure during a routine doctor visit. To confirm that you have high blood pressure, your blood pressure must reach or exceed 140/90 mm Hg on three or more separate occasions. It is usually measured 1 to 2 weeks apart. Except in very severe cases, the diagnosis is not based on a single measurement.
If there is reason to suspect that the blood pressure measurements taken in the doctor’s office do not represent your accurate blood pressure (if, for example, you have white-coat hypertension), you may need to check your blood pressure away from the doctor’s office. Your blood pressure can rise more than 20 mm Hg systolic and 10 mm Hg diastolic from white-coat hypertension. Even routine activities, such as attending a meeting, can raise your blood pressure by that amount. Other factors that can raise your blood pressure include commuting to work, exposure to cold, and drinking large amounts of alcohol.
Your doctor may have you check your blood pressure at home 3 times a day and keep a record of the readings. Or you may need to wear an automated blood pressure cuff that periodically inflates and takes blood pressure measurements during the day. This is called ambulatory blood pressure monitoring.
If you fall into the prehypertension range (120â€“139/80â€“89 mm Hg), your doctor will likely recommend lifestyle modifications, including losing excess weight, exercising, limiting alcohol, cutting back on salt, quitting smoking, and following the Dietary Approaches to Stop Hypertension (DASH) diet. The DASH eating plan is a low-fat and low-saturated-fat diet that emphasizes eating more fruits, vegetables, whole grains, and low-fat dairy foods.
If you have high blood pressure (140â€“159/90â€“99 mm Hg) and you do not have any organ damage or other risk factors for heart disease (uncomplicated high blood pressure), your doctor will likely recommend lifestyle changes and possibly medications. Most people with high blood pressure will need two or more medications, including a thiazide-type diuretic, to lower their blood pressure to below 140/90 mm Hg, the goal for people with uncomplicated hypertension. If you have other conditions, such as diabetes, heart failure, or chronic kidney disease, your goal blood pressure is lower: 130/80 mm Hg.
If your blood pressure is 160â€“179/100â€“109 mm Hg or higher, you and your doctor may need to try various combinations of medications to find what works best for you. You will also need to make aggressive lifestyle changes.
Overall, your treatment will depend upon how high your blood pressure is, whether you have other medical conditions, such as diabetes, and whether any organs have already been damaged. Your risk of developing other diseases, especially heart disease, will be another important factor your doctor will consider.
Deciding whether to treat high blood pressure with medication and choosing the best medication are based mainly on:
Doctors may have different opinions about when to start medications for high blood pressure.
Doctors usually prescribe a single, low-dose medication first. If blood pressure is not controlled, he or she may change the dosage or try a different medication or combination of medications. It is common to try several medications before your blood pressure is successfully controlled. Many people need more than one medication to get the best results.
All of these medications are effective for lowering the risk of heart attack and stroke. Treatment for high blood pressure must be highly individualized and based on your risk factors, such as diabetes, smoking, and heart disease. Although one study may recommend a particular medication as the first line of treatment, it may not be best for you based on your medical condition. What’s most important is that you work with your doctor to find the right medication or combination of medications that have the fewest side effects and work well for you and that you take your medications regularly as prescribed.
If other conditions, such as heart failure or diabetes, are present, ACE inhibitors or ARBs often are used as the first line of therapy because the other medical conditions also may benefit from these medications. However, isolated systolic hypertension may respond best to diuretics alone.
If the above medications are not effective in lowering blood pressure, or if side effects of the above medications are serious, other medications called vasodilators may be tried.
Doctorsolve Healthcare Solution site strives to provide you with timely, accurate information, which is not intended for diagnosis or treatment.