Isolated Diastolic Hypertension

Overview

Isolated diastolic hypertension means your blood pressure is high only in the bottom number. Blood pressure is written as two numbers, like 120/80. The top number is the pressure when your heart beats. The bottom number is the pressure when your heart rests between beats. In this condition, the bottom number is above the healthy range, while the top number is not.

It is less common than high systolic blood pressure, especially in older adults. It is seen more often in younger and middle-aged adults, but estimates vary.

It can affect adults of any age, but it is more often noticed in younger and middle-aged adults. It can also occur in children, though this is rare and needs careful checking.

Symptoms

Common symptoms

• Most people have no symptoms. You cannot feel high blood pressure, so regular checks are important.
• Some people may have headaches, dizziness, or feel generally unwell, but these symptoms are not reliable signs of high blood pressure.
• Very high blood pressure can cause serious symptoms, but this is not common.

Symptoms in children

• High blood pressure in children is uncommon. When it happens, doctors compare the reading with normal ranges for the child's age, sex, and height.
• Children usually have no symptoms, so it is found through routine checks or when another health problem is being checked.
• A single high reading is not enough. Repeated readings and a doctor's review are needed.

Symptoms in older adults

• In older adults, high systolic pressure (the top number) is more common. A high diastolic number alone is less common.
• Blood vessels can stiffen with age, which changes blood pressure patterns.
• Older adults with high diastolic pressure should be checked for other health conditions and reviewed regularly.

Causes

Main causes

• Often there is no single clear cause. This is called primary or essential high blood pressure.
• Sometimes another health problem can raise blood pressure, such as kidney disease, sleep apnea (a breathing problem during sleep), thyroid problems, or hormone conditions.
• Some medicines can raise blood pressure, including certain pain relievers, decongestants, and some hormonal medicines. Ask your pharmacist or doctor if you are unsure.
• Stress, poor sleep, and drinking too much alcohol can also play a part.

Risk factors

• Family history of high blood pressure
• Being overweight or having obesity
• Eating a lot of salt and not enough potassium, which is found in fruits and vegetables
• Drinking too much alcohol
• Smoking or using tobacco
• Not being physically active
• Long-term stress and poor sleep
• Chronic kidney disease, diabetes, or sleep apnea
• Taking some medicines that can raise blood pressure

When to see a doctor

See a doctor urgently if:

• You have a blood pressure reading around 180/120 or higher, even if you feel fine.
• You have new chest pain, shortness of breath, weakness, numbness, trouble speaking, or vision changes. Call emergency services first.
• You are pregnant or recently gave birth and have a high reading or feel unwell.
• You have a severe headache, confusion, or fainting.

Book a routine appointment if:

• Your blood pressure is high on more than one occasion.
• You have a home blood pressure monitor and readings are often above your target.
• You have risk factors such as diabetes, kidney disease, or a family history of early heart disease.
• You have side effects from blood pressure medicine or need a review.
• You want advice about lifestyle changes or checking your blood pressure at home.

Diagnosis

Your doctor will check your blood pressure more than once, usually on separate visits. They may ask you to measure it at home or wear a monitor for 24 hours. They will also ask about your health, medicines, and lifestyle, and may do tests to look for causes and check your overall risk.

Tests that may be done

• Repeated blood pressure readings in the clinic
• Home blood pressure monitoring with a monitor that has been checked for accuracy
• Ambulatory blood pressure monitoring, where you wear a cuff for 24 hours
• Blood tests to check kidney function, blood sugar, cholesterol, and thyroid
• Urine test to check kidney health
• An ECG (heart tracing) if needed
• Checking your cardiovascular risk, which is your chance of heart and circulation problems

What to expect at your appointment

You may be asked to keep a diary of readings for a week or two. Your doctor will look at the pattern, not just one number. If readings are high, you will usually start with lifestyle changes and be reviewed. Some people need medicine. You should have a chance to ask questions and agree on a plan.

Treatment

Treatment aims to lower your chance of heart, kidney, and circulation problems. It usually starts with lifestyle changes. If your blood pressure stays high or your overall risk is higher, your doctor may suggest blood pressure-lowering medicine. The right plan depends on your age, other health conditions, and your preferences.

Self-care at home

• Cut down on salt. Aim for no more than about 1 teaspoon, or 6 g, of salt a day from all sources.
• Eat more fruit, vegetables, beans, and low-fat dairy, and choose whole grains.
• Be active most days. Aim for at least 150 minutes of moderate activity a week, such as brisk walking.
• Lose weight if you are overweight. Even a small loss can help.
• Limit alcohol and avoid binge drinking.
• Stop smoking and avoid secondhand smoke.
• Get enough sleep and manage stress with relaxation, hobbies, or talking to someone.
• Check your blood pressure at home if your doctor advises, using a properly fitting cuff.
• Take any prescribed medicine as directed and do not stop without advice.

Medical treatments

If lifestyle changes are not enough, your doctor may recommend blood pressure-lowering medicine. There are several types, and your doctor will choose one based on your health, age, and other conditions. You may need a combination. Medicines work best alongside healthy habits. Do not start, stop, or change any medicine without talking to your doctor or pharmacist.

When is surgery considered?

Surgery is not a treatment for isolated diastolic hypertension. In rare cases, a specific cause such as a hormone problem or a narrowed kidney artery may need a procedure, but this is decided by a specialist.

Living with this condition

Living with high blood pressure usually means regular checks, healthy habits, and taking medicine if prescribed. Many people feel well and can live a normal life. Keep appointments and ask your doctor what blood pressure target is right for you.

Lifestyle tips

• Check your blood pressure at home if advised and keep a record.
• Take medicines at the same time each day if prescribed.
• Keep salt low and eat a balanced diet.
• Stay active and sit less.
• Limit alcohol and quit smoking.
• Sleep well and manage stress.
• Go to routine reviews and blood tests as asked.

Diet and exercise

A heart-healthy eating pattern with plenty of vegetables, fruit, whole grains, beans, nuts, and low-fat dairy, and less salt and processed food, can help lower blood pressure. Aim for moderate activity most days, such as walking, cycling, or swimming. Build up slowly if you are not used to exercise. Ask your doctor before starting a new vigorous exercise plan if you have other health problems.

Mental health and emotional wellbeing

Being told you have high blood pressure can feel worrying. Some people feel anxious about checking their numbers. That is normal. Talk to your doctor if worry affects your sleep or daily life. If you feel overwhelmed or have thoughts of harming yourself, contact your local emergency number or a crisis support service in your country right away.

Prevention

You cannot always prevent high blood pressure, especially if it runs in your family. But healthy habits can lower your risk and help keep your blood pressure in a healthier range.

Vaccines

There is no vaccine for isolated diastolic hypertension. Staying up to date with recommended vaccines is still good for your general health.

Screening programmes

Blood pressure is checked at routine health visits. In the UK, adults are often offered an NHS Health Check every 5 years from age 40 to 74. Ask your doctor or pharmacist how often you should have your blood pressure checked, especially if you have risk factors.

Complications

If left untreated

• Over time, high blood pressure can damage the heart, brain, kidneys, eyes, and blood vessels.
• It raises the risk of heart attack, stroke, heart failure, kidney disease, and some types of dementia.
• It can also cause sexual problems and poor circulation in the legs.
• The higher the blood pressure and the longer it is uncontrolled, the greater the risk.

Long-term outlook

The outlook is good for most people. Isolated diastolic hypertension can often be managed with healthy habits, regular checks, and medicine if needed. Treating it early lowers the chance of future problems. Many people live full, active lives with well-controlled blood pressure.

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