Cardiovascular system health overview

Overview

Your cardiovascular system is your heart and blood vessels. It pumps blood around your body, delivering oxygen and nutrients to your organs and removing waste. Keeping this system healthy is key to overall well-being.

Conditions affecting the cardiovascular system are very common. Many people have high blood pressure, high cholesterol, or other risk factors. The good news is that most of these can be managed with healthy habits and medical care.

Cardiovascular issues can affect anyone, but your risk increases as you get older. It also runs in families and is more common in people who smoke, have an unhealthy diet, or do not get enough exercise.

Symptoms

Common symptoms

• Chest discomfort or pain (angina) – may feel like pressure, squeezing, or heaviness.
• Shortness of breath – especially during activity or when lying flat.
• Unexplained fatigue or weakness.
• Swelling in the legs, ankles, or feet (oedema).
• Irregular or rapid heartbeat (palpitations).

Symptoms in children

• In children, symptoms are rare but can include poor weight gain, difficulty feeding, or turning blue around the lips (cyanosis).
• Some children are born with heart defects that may cause fatigue, fast breathing, or fainting during exercise.

Symptoms in older adults

• Older adults may have classic symptoms like chest pain, but sometimes they experience more vague signs – such as confusion, dizziness, fainting, or extreme tiredness.
• Shortness of breath that gets worse over time is common.

Causes

Main causes

• A build-up of fatty deposits in your arteries (atherosclerosis) – this narrows blood vessels and can lead to heart attacks and strokes.
• High blood pressure (hypertension) – strains your heart and damages arteries over time.
• High cholesterol – contributes to artery blockages.
• Diabetes – high blood sugar can damage blood vessels.

Risk factors

• Smoking or using tobacco products.
• Lack of physical activity.
• Eating a diet high in saturated fats, salt, and added sugars.
• Being overweight or obese.
• Drinking too much alcohol.
• Family history of heart disease.
• Age – risk increases after 45 in men and 55 in women.

When to see a doctor

See a doctor urgently if:

• Call your local emergency number if you have chest pain, sudden shortness of breath, or signs of a stroke (face drooping, arm weakness, speech trouble).
• Seek same-day care for new chest discomfort that comes and goes, a rapid heartbeat that does not stop, or sudden severe leg swelling.

Book a routine appointment if:

• See your doctor for a regular blood pressure and cholesterol check – every 1–2 years if you are over 40, or earlier if you have risk factors.
• Talk to your doctor if you feel unusually tired, short of breath, or notice any change in your exercise tolerance.

Diagnosis

Your doctor will start by asking about your symptoms, lifestyle, and family history. They will listen to your heart and lungs, check your pulse, and take your blood pressure.

Tests that may be done

• Blood tests – including cholesterol and blood sugar levels.
• Electrocardiogram (ECG) – records your heart's electrical activity.
• Echocardiogram – an ultrasound of your heart to check its structure and function.
• Stress test – shows how your heart performs during exercise.
• Coronary angiography – dye is used to see blockages in your heart's arteries.

What to expect at your appointment

Most tests are quick and painless. You may need to fast for blood tests. A stress test involves walking on a treadmill. Your doctor will explain each step and what the results mean for your care.

Treatment

Treatment for cardiovascular problems focuses on reducing your risk of heart attack or stroke and managing any existing damage. It usually starts with lifestyle changes and may include medications or procedures if needed.

Self-care at home

• If you smoke, seek help to quit. Your doctor can point you to stop-smoking support.
• Aim for at least 150 minutes of moderate activity (like brisk walking) each week.
• Eat a heart-healthy diet – plenty of fruits, vegetables, whole grains, fish, and healthy fats like olive oil.
• Limit salt, sugar, and foods high in saturated fat.
• Maintain a healthy weight.

Medical treatments

Your doctor may prescribe medications to lower blood pressure, control cholesterol, or manage diabetes. Some people need blood thinners to prevent clots. Always take medicines exactly as prescribed and never stop them without talking to your doctor.

When is surgery considered?

If arteries are severely blocked, procedures such as angioplasty (opening a narrowed artery with a balloon) or bypass surgery (creating a new route for blood flow) may be recommended. Your doctor will discuss these options with you.

Living with this condition

Living with a heart condition means being more aware of your body. Take your medications as directed, keep your doctor appointments, and watch for changes in your symptoms. Many people lead full, active lives with good management.

Lifestyle tips

• Get enough sleep – aim for 7–9 hours a night.
• Manage stress with relaxation techniques like deep breathing, meditation, or hobbies you enjoy.
• Avoid second-hand smoke and limit alcohol.
• Keep up with regular checkups – even if you feel fine.

Diet and exercise

A heart-healthy diet and regular exercise are the cornerstones of care. Focus on moderate activities that you enjoy – walking, swimming, cycling. Start slowly if you are new to exercise. Speak to your doctor before starting a new workout routine.

Mental health and emotional wellbeing

Living with a heart condition can cause anxiety, fear, or depression. It is normal to feel worried. Talk to your doctor about your feelings – you are not alone and support is available.

Prevention

While you cannot change your age or family history, you can greatly reduce your risk by making healthy choices. Not smoking, eating well, staying active, and managing stress are powerful ways to protect your heart.

Vaccines

Getting recommended vaccines – such as the flu vaccine and pneumonia vaccine – can help prevent infections that put strain on your heart.

Screening programmes

Regular blood pressure checks, cholesterol tests, and diabetes screening are important. Your doctor will recommend a schedule based on your age and risk factors.

Complications

If left untreated

• Heart attack (myocardial infarction).
• Stroke – when a clot blocks blood flow to the brain.
• Heart failure – the heart becomes too weak to pump effectively.
• Arrhythmias – dangerous irregular heartbeats.
• Peripheral artery disease – narrowed arteries in your legs causing pain and reduced mobility.

Long-term outlook

The outlook for cardiovascular health is very positive when caught early. Many people live long, active lives by managing their risk factors and working closely with their healthcare team. Small changes today can make a big difference tomorrow.

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