16851 Catheter Ablation

Overview

Catheter ablation is a procedure used to treat certain heart rhythm problems, called arrhythmias (say: uh-RITH-mee-uhs). An arrhythmia is when your heart beats too fast, too slowly, or in an uneven way. During ablation, a doctor guides thin, flexible tubes called catheters (say: KATH-uh-ters) through a blood vessel — usually in your groin — up to your heart. Special tips on these tubes then create tiny, precise scars in the small areas of heart tissue that are causing the abnormal beat. Those tiny scars stop the faulty electrical signals, so the heart can settle back into a normal rhythm. It is not open-heart surgery, and many people go home the same day or the next day.

Yes. Catheter ablation is a well-established and commonly performed heart procedure worldwide. It has been done for several decades and is a routine option in most heart centres for certain rhythm problems, especially atrial fibrillation (an uneven, often fast heartbeat), atrial flutter, and fast heart rhythms that start in the upper chambers of the heart.

It can be offered to adults of almost any age and, in some cases, to children and teenagers. It is most often considered for people whose heart rhythm problem causes troublesome symptoms, or for people who do not get enough benefit from heart rhythm medicines, or who prefer not to take them long term. It is also used for some people with certain fast or dangerous heart rhythms. Your doctor will consider your overall health, other conditions, and your own preferences.

Symptoms

Common symptoms

• A fluttering, pounding, or racing feeling in the chest (palpitations)
• A heartbeat that feels uneven, skipped, or too fast
• Feeling lightheaded or dizzy
• Shortness of breath, especially with activity
• Unusual tiredness or low energy
• Chest discomfort or a vague pressure in the chest
• Feeling faint, or actually fainting
• Needing to pass urine more often during an episode (some people notice this)

Symptoms in children

• A very fast heartbeat that can be hard to notice in a young child
• Poor feeding or sweating during feeds in babies
• Becoming tired quickly during play compared with other children
• Looking pale or grey around the lips during an episode
• Older children may describe their heart 'flipping' or 'racing', or say their chest feels funny
• Fainting or near-fainting, which should always be checked promptly

Symptoms in older adults

• Breathlessness and tiredness may be more noticeable than a racing heartbeat
• Feeling generally weaker or less able to do usual activities
• Dizziness or unsteadiness, which can raise the risk of falls
• Swelling in the ankles or legs, which can be a sign the heart is under strain
• Confusion or feeling 'not yourself' during an episode, which is a reason to seek care quickly
• Symptoms may be put down to 'just getting older', so it is worth mentioning any change to your doctor

Causes

Main causes

• An extra or 'short-circuit' electrical pathway in the heart that a person is born with
• Small patches of heart tissue that fire off electrical signals on their own
• Scarring of heart tissue after a heart attack or from heart muscle disease
• Rapid, chaotic electrical activity around the veins that bring blood into the heart — the usual trigger for atrial fibrillation
• Changes in the heart's electrical system caused by long-standing high blood pressure or valve problems
• An overactive thyroid gland or other hormone imbalance
• Some medicines, stimulants, alcohol, or caffeine can trigger or worsen episodes

Risk factors

• Getting older — rhythm problems become more common with age
• High blood pressure
• Coronary heart disease or a previous heart attack
• Heart valve disease or heart muscle weakness
• An overactive thyroid gland
• Sleep apnoea (breathing pauses during sleep)
• Heavy alcohol use or binge drinking
• Being overweight
• Diabetes
• A family history of heart rhythm problems
• Certain heart rhythm problems are simply due to the heart's wiring and are not caused by lifestyle at all

When to see a doctor

See a doctor urgently if:

• Palpitations that keep coming back or last longer than usual
• A racing heartbeat with dizziness, breathlessness, or chest discomfort
• Fainting or nearly fainting, even once
• New ankle or leg swelling with breathlessness
• After an ablation: heavy bleeding, a rapidly swelling or painful groin, fever, or chest pain

Book a routine appointment if:

• You notice occasional fluttering or a skipped beat and want it checked
• You feel more tired or breathless than expected during everyday activity
• You have a known rhythm problem and your symptoms are changing
• You want to discuss whether your heart rhythm medicines are still right for you
• You are considering ablation and want to talk through the benefits and risks

Diagnosis

Doctors first take a detailed history of your symptoms — when they happen, how long they last, and what brings them on — and examine you. The key test is an electrocardiogram (ECG), which records the heart's electrical signals through small sticky patches on the chest. Because rhythm problems often come and go, you may be asked to wear a portable monitor at home for a day or longer so a recording can be captured during an episode. Blood tests and a heart ultrasound (echocardiogram) are commonly done to look for underlying causes. If ablation is being considered, you may have an electrophysiology study, where catheters inside the heart map exactly where the faulty signals start.

Tests that may be done

• Electrocardiogram (ECG) — a painless recording of the heart's electrical activity
• Ambulatory monitor — a portable ECG worn for 24 hours or longer, or an event recorder used only when symptoms happen
• Echocardiogram — an ultrasound scan that shows the heart's size, valves, and pumping
• Blood tests — to check thyroid, kidney function, salts, and blood counts
• Exercise or stress test — to see how the heart behaves during activity
• Electrophysiology study — a procedure using thin catheters inside the heart to map the electrical pathways
• Sometimes a heart MRI or CT scan for more detailed images

What to expect at your appointment

Most tests are quick and painless, and you can usually go about your day afterwards. Monitors are worn at home and returned later. If you are offered an electrophysiology study, it is done in a specialised heart laboratory, usually with light sedation and numbing medicine at the catheter site, so it should not be painful. Your team will explain what they find and discuss the options with you, including medicines, ablation, or simply monitoring if the rhythm problem is not causing trouble.

Treatment

Treatment for a heart rhythm problem is shaped around you: how troublesome your symptoms are, how often they happen, what other health conditions you have, and what matters most to you. Options range from watching and making lifestyle changes, to medicines that steady the heartbeat, to catheter ablation. Ablation is usually performed under light sedation or general anaesthetic. Thin catheters are passed through a blood vessel, often in the groin, into the heart. The team maps the electrical signals, then uses either heat (radiofrequency) or cold (cryotherapy) energy to make tiny scars in the small area causing the problem. The catheters are then removed, and you rest while the tiny puncture site seals.

Self-care at home

• Take your medicines exactly as prescribed, and ask your pharmacist before starting anything new, including over-the-counter remedies and supplements
• Cut back on alcohol — it is one of the most common triggers for rhythm problems
• Limit caffeine if you notice it sets off symptoms, though many people can still enjoy tea or coffee in moderation
• Avoid crash diets and dehydration, both of which can upset heart rhythm
• Learn to take your own pulse, so you can tell your doctor what your heartbeat is doing
• Keep a simple symptom diary: date, time, how long it lasted, and what you were doing
• After ablation, follow your team's advice on resting the groin site and on when you can drive, lift, or return to exercise
• Attend your follow-up appointments, even if you feel completely well

Medical treatments

Your doctor may suggest medicines to slow the heart rate, to steady the rhythm, or to reduce the chance of stroke in certain rhythm problems such as atrial fibrillation. These are usually described by their group — for example rate-control medicines, rhythm-control medicines, and blood-thinning medicines — rather than by brand. Some people also use a 'pill in the pocket' plan, where a medicine is taken only when an episode starts, if their doctor feels this is safe for them. Other treatments include cardioversion, where a carefully controlled electric shock is used to reset the heart rhythm, and implantable devices for particular rhythm problems. Your team will explain which options suit you, along with the benefits and drawbacks of each. Never stop or change a heart medicine on your own.

When is surgery considered?

Catheter ablation is itself a procedure rather than open surgery, and it is considered when symptoms are troublesome despite medicines, when medicines cause side effects or do not suit you, or when you would rather not take long-term medicine. It may also be offered early for certain rhythm problems where it works particularly well, and it can be life-saving for some dangerous heart rhythms. Open heart surgery is only rarely needed for rhythm problems, usually when there is another heart issue — such as a valve problem — that needs repairing at the same time. Your cardiologist will talk through the likely benefits, the chance the procedure may need repeating, and the risks for your particular situation.

Living with this condition

Most people find that once their rhythm is under control, they can get back to normal life — work, family, travel, and hobbies. It helps to know your own triggers and to pace yourself during a flare-up. After ablation, expect some bruising and tenderness where the catheter went in, and possibly some extra or skipped heartbeats for a few weeks while the heart settles; these often fade. Tell your doctor if symptoms persist or return, because a second procedure or a change in medicine sometimes helps. Keep a list of your medicines and your clinic contact details with you.

Lifestyle tips

• Stay active — regular moderate exercise such as walking, swimming, or cycling is good for the heart; ask your team what is safe for you
• Keep to a healthy weight, as extra weight puts strain on the heart and is linked to atrial fibrillation
• Limit alcohol, and avoid binge drinking
• Do not smoke, and get help if you want to stop
• Get treatment for loud snoring or suspected sleep apnoea
• Manage stress with things that work for you — breathing exercises, time outdoors, hobbies, or talking to someone
• Keep blood pressure and blood sugar in a healthy range if you have diabetes
• Stay well hydrated, especially in hot weather or during exercise

Diet and exercise

A heart-friendly way of eating is built on plenty of vegetables and fruit, whole grains, beans and lentils, nuts, oily fish, and olive or rapeseed oil, with less processed food, salt, and sugary drinks. There is no single 'heart rhythm diet', but cutting back on alcohol and very large, heavy meals can reduce episodes for some people. Aim for regular, moderate activity most days — a brisk walk counts. Build up gradually, especially in the weeks after a procedure, and follow the specific advice your team gives you about lifting and exercise. If exercise brings on symptoms, stop, rest, and mention it at your next appointment.

Mental health and emotional wellbeing

Living with an unpredictable heartbeat can be genuinely unsettling. Many people describe anxiety about when the next episode will come, worry about fainting in public, or trouble sleeping. That is a very normal response and not a sign of weakness. Talking about it helps — with your doctor, a nurse specialist, a counsellor, or people who have been through the same thing. If worry is affecting your sleep, mood, or daily life, please tell your care team; support is available. If you ever feel overwhelmed or have thoughts of harming yourself, contact your local emergency number or a crisis support service in your country straight away — you deserve help quickly.

Prevention

Some heart rhythm problems come from the heart's built-in wiring and cannot be prevented. Others are closely linked to things you can influence: high blood pressure, heavy drinking, being overweight, sleep apnoea, and poorly controlled diabetes. Keeping these in check lowers the chance of developing rhythm problems and can reduce how often episodes happen. Ablation itself is a treatment rather than a prevention, though it can prevent symptoms and, in some people, prevent the rhythm problem from coming back.

Vaccines

There is no vaccine for heart rhythm problems. Staying up to date with recommended vaccinations — including flu and pneumonia vaccines if your doctor advises them — helps protect you from infections that can put extra strain on the heart.

Screening programmes

There is no routine national screening programme for most heart rhythm problems. Heart checks are usually done when symptoms appear. If you have a strong family history of rhythm problems or a known inherited heart condition, ask your doctor whether a heart tracing or a referral to a specialist clinic is right for you. Simple pulse checks at routine appointments can also help pick up an irregular heartbeat.

Complications

If left untreated

• Symptoms may continue to interfere with work, sleep, and everyday activities
• The heart may become weaker over time if it is beating very fast or unevenly for long periods
• Some rhythm problems, particularly atrial fibrillation, raise the risk of stroke
• Fainting can lead to falls and injuries
• Repeated hospital visits and worry can take a toll on daily life
• Rarely, certain dangerous heart rhythms can be life-threatening

Long-term outlook

The outlook is generally good. Catheter ablation helps many people have far fewer symptoms, or none at all, and some are able to reduce or stop their rhythm medicines afterwards. It does not work for everyone first time — a second procedure is sometimes needed — and some people continue with medicines. Serious complications are uncommon, and your team will discuss your personal risks with you beforehand. Most people recover within days to a couple of weeks and get back to normal life. Even if you need ongoing treatment, there is a lot you and your care team can do together to keep you feeling well.

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