What is an arrhythmia?

An arrhythmia refers to an abnormal heart rhythm or rate. Your heart may beat too fast (tachycardia), slow (bradycardia), or in irregular, unsteady patterns. You might experience this constantly, or it might happen in intermittent episodes. 

How common is arrhythmia?

We expect our heart rate to increase during strenuous exercise or while stressed, but we consider a resting heart rhythm steady if it’s beating between 60-100 beats per minute and at regular intervals. However, some people can fall outside this range and still be perfectly healthy. 

Arrhythmias are common and affect around two million people in the UK every year, affecting people of all ages and fitness levels. However, certain types are more common in some groups (such as people with specific pre-existing health conditions, smokers, and people over 65).

Each person experiences their condition differently, and it can impact you in many ways. Read more about that here: What’s the impact of an arrhythmia diagnosis? We discuss how it may affect your driving, life at work, holidays and mental health.

Our Consultant Cardiologist and Heart Rhythm specialist, Dr Syed Ahsan, is an expert in diagnosing and treating heart rhythm disorders. Book an appointment to discuss your symptoms and arrange diagnostic tests.

Symptoms

Noticeable symptoms can range from mild to severe. The severity of your symptoms might not match the seriousness of the underlying problem. Serious heart rhythm disorders can cause barely any symptoms (a silent condition) and vice versa.

Symptoms include: 

  • Breathlessness 
  • Low blood pressure 
  • Chest discomfort or pain (angina) 
  • A fluttering or pounding in the chest 

You may also experience: 

  • Anxiety 
  • Sweating 
  • Feeling weak 
  • Blurred vision 
  • ‘Passing out’ or fainting 
  • Dizziness/ lightheadedness 
  • Persistent tiredness/ fatigue 
  • Confusion or difficulty concentrating

Some people find that their symptoms worsen at night as they lay down and their heart rate slows. You may find more relief if you sleep on your right side. 

Stress or anxiety can trigger this condition, so it’s important to manage your mental health. We understand that it can be difficult with a heart condition, but many things can help. For example, asking your GP or loved ones for support, trying yoga or relaxation techniques, and learning how to prevent future episodes.

How do you know if you have an abnormal heart rhythm?

It may feel like you have a racing heart, or your heart is beating far more slowly. You might experience your heart ‘skipping beats’ or having extra or more powerful beats (palpitations). In that sense, you may feel an abnormal heart rhythm, though it can be difficult to tell. 

Some people experience no symptoms. For these people, we might detect it during routine testing or when we perform tests for other reasons. 

Read our blog to learn more: How can you tell if you have a heart rhythm disorder? 

When to seek help

Speak to your GP if you often experience the above or have a history of heart problems. There are other possible causes, which is why it can help to talk to a specialist 

If you suddenly experience arrhythmia symptoms, such as chest pain or fainting, seek immediate medical attention. You can call 111 if you aren’t sure whether you need urgent care. They may recommend booking an appointment with your GP or visiting the hospital/ calling 999. 

Diagnosis

It is not always obvious that we have an abnormal heart rhythm. The only way to accurately diagnose this condition is through seeing a specialist. During your first consultation, we will discuss the problems you have been having and for how long. We need to know how severe your symptoms are and how often you have them.

We will ask about your medical and family’s medical history as well as general lifestyle choices to figure out the probable cause. These may include asking whether you smoke and how often you drink alcohol. 

Our physical exam will involve listening to your heart, checking your blood pressure, and taking your pulse. We may be able to detect warning signs through your symptom history and pulse. However, we will require other tests to confirm a diagnosis.  

An electrocardiogram (ECG) is the most effective diagnostic test for this. You may need a different type of ECG, such as a 24-hour ECG (Holter monitor), event recorder, or an exercise ECG, if a standard one does not find the issue. You may also need an echocardiogram or an electrophysiological (EP) study. 

You can find more information about the tests available on our Cardiac Diagnostic Tests page.

Types

There are many types of heart rhythm disorders. Generally, we group them by conditions that cause fast or slow heartbeats. Another type is a premature heartbeat or extra beats, such as ventricular ectopics. 

Fast heart rhythms are commonly caused by atrial fibrillation (AF), ventricular fibrillation, atrial flutter, ventricular tachycardia, or supraventricular tachycardia. Slow heart rhythms include sinus bradycardia and conduction block.  

If you have sick sinus syndrome, you may experience a beat that alternates from too fast to too slow. This is known as tachy-brady syndrome.

Are arrhythmias dangerous?

Some are not dangerous, although they may still be alarming and impact your quality of life. Others can be serious if untreated and unmanaged. A key example is AF, which is particularly common in people over 65. We characterise this with an irregular heartbeat that is often faster than usual. It can cause blood to pool in the heart’s upper chambers, which may result in clots. AF is a leading risk factor for strokes – but it can be easily diagnosed and managed with the correct lifestyle advice and treatment. Blood thinners can help prevent strokes from AF and other heart rhythm disorders. 

Other complications of abnormal heart rhythms include sudden death arrhythmia syndrome (SADS), heart failure, and a heart attack. Over time, it can also increase your risk of Alzheimer’s and dementia. We understand this is scary, but we can reduce your risk of these complications greatly by diagnosing your condition early and managing it effectively. 

Some of the symptoms of this condition, such as the risk of fainting, can affect your ability to drive. You must notify the Driver and Vehicle Licensing Agency (DVLA) if it affects your driving. Dr Ahsan can provide advice on whether it is safe for you to drive. Contact us to discuss this further.

Causes

It happens due to a problem with the part of your heart that controls your electrical impulses, known as the conduction system. Your heart has a natural pacemaker called the sinus node, which sends electrical signals to the atrioventricular node and onwards to make the heart beat. We call this the conduction pathway. Other parts of the heart are involved, but if there is an issue with this process, it can disrupt your heart’s rhythm. Many factors can influence your heart’s rhythm, as we detail below.

 

Risk factors

Inherited and underlying conditions can increase your risk of abnormal heart rhythms, such as cardiomyopathy, coronary heart disease, and long-QT syndrome (LQTS).  

Issues that can alter your heart rhythm include:  

  • An injury to your heart (heart damage) 
  • Obstructive sleep apnoea  
  • Electrolyte imbalance  
  • Certain medications 
  • High blood pressure 
  • Anaemia 
  • Diabetes 

Other factors that can trigger an arrhythmia: 

  • Panic disorders and emotional stress 
  • Tobacco and other recreational drugs 
  • Viral illnesses 
  • Caffeine 
  • Alcohol 

Treatment

Your treatment plan will depend on which type of heart rhythm disorder you have, how severe your symptoms are, and the underlying cause. We will recommend lifestyle changes alongside treatment to prevent further episodes. For example, eating a healthy diet, exercising regularly, and reducing stress. There are some movements you can try called vagal manoeuvres, which affect the vagus nerve and help your body relax. Read more about this here: Lifestyle changes to help manage arrhythmia.

Treatments include medications, such as anti-arrhythmic drugs, cardioversion, catheter ablation, and inserting a pacemaker or an implantable cardioverter defibrillator (ICD). You may need coronary bypass surgery if severe coronary artery disease affects your heart rhythm. 

Living with an abnormal heart rhythm

While it can be a lot to deal with, you can live normally if you follow your treatment plan. If your treatment plan is not working, our specialists will adapt it as necessary. To ensure you feel supported and less challenged by your condition, choose a doctor who communicates with you and understands what it means for you. You also may benefit from joining a support group.

Arrhythmia FAQs

What if I’m just getting palpitations?

Palpitations – where it feels like your heart is beating much harder than usual – are quite common. Although sometimes distressing, they are rarely serious and often caused by anxiety and panic attacks, drinking too much coffee or alcohol, or smoking.  

However, they can also be a symptom of an underlying problem that may need to be managed and treated, so do not ignore these. Even if there is nothing wrong with your heart, it is helpful to investigate the root cause of palpitations. Often, simple lifestyle measures and management techniques can make a significant difference. 

Will I need to give up driving?

Whether you can drive with an abnormal heart rhythm will depend on how it affects you. Speak to your doctor if you are concerned about your driving ability.

Not everyone with this condition needs to stop driving. However, you may need to wait until we establish that your treatment plan is working. We discuss this further in our blog: What’s the impact of an arrhythmia diagnosis?

Book an appointment

If you are concerned about your symptoms or a new diagnosis, Dr Syed Ahsan is here to help. Our leading heart specialist can assess your symptoms and help you explore treatment options. 

Call us on 0203 303 0325 or email [email protected] to find out more. Alternatively, you can book a consultation via our online booking form. 

What our patients say

After suffering from a heart condition for a number of years I was very happy to meet Dr Ahsan, from the first consultation where he believed there was a solution I have now completed the surgery and had my final consultation with him today…”

I am very grateful to have Dr Syed Ahsan as my consultant. Dr Ahsan always greets you warmly on each visit despite his busy workload. Dr Ahsan explains everything clearly and helps you to understand even the most complex medical terms…”

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