An irregular heartbeat can feel unsettling, especially if it appears suddenly or occurs repeatedly. Many people notice it as a fluttering sensation in the chest, a racing heartbeat, or a feeling that the heart is skipping beats. In some cases, an irregular rhythm causes no symptoms at all and is only detected during a routine test.

While an irregular heartbeat does not always mean there is a serious heart problem, it can sometimes indicate an underlying condition that requires assessment. We regularly evaluate patients with irregular heart rhythms and help determine whether further investigation or treatment is necessary.

What Is an Irregular Heartbeat?

A normal heartbeat follows a regular rhythm known as sinus rhythm. In adults at rest, this rhythm typically ranges between 60 and 100 beats per minute. An irregular heartbeat occurs when the heart’s electrical signals become disrupted. The heart may beat too quickly, too slowly, or in an uneven pattern. Some irregular heartbeats occur occasionally and are harmless. Others reflect arrhythmias, which are conditions affecting the heart’s electrical system.

Atrial Fibrillation

One of the most common causes of an irregular heartbeat is atrial fibrillation (AF). In this condition, the upper chambers of the heart beat chaotically instead of contracting in a coordinated way. This leads to an irregular and often rapid pulse. Some people experience palpitations, breathlessness, fatigue, or dizziness. Others have no symptoms and only discover the condition during an ECG. Atrial fibrillation increases the risk of stroke because blood can pool in the heart and form clots. Treatment often includes medication to control heart rate and reduce clot risk.

Atrial Flutter

Atrial flutter is another rhythm condition that affects the heart’s upper chambers. It produces a fast but more organised rhythm compared with atrial fibrillation. Patients may experience palpitations, chest discomfort, breathlessness, or fatigue. In some cases, atrial flutter alternates with atrial fibrillation. Treatment may involve medication, cardioversion, or procedures designed to restore normal rhythm.

Supraventricular Tachycardia

Supraventricular tachycardia (SVT) refers to a group of rhythm problems that cause episodes of rapid heartbeat. These episodes often start and stop suddenly. During an episode, the heart rate may rise significantly, sometimes exceeding 150 beats per minute. People may feel pounding in the chest, dizziness, or anxiety. Although SVT is often not life threatening, recurrent episodes can be disruptive and may require treatment or specialist evaluation.

Premature Heartbeats

Premature heartbeats occur when extra electrical impulses arise earlier than expected. These are sometimes described as skipped or extra beats. Premature beats may originate in the upper chambers (premature atrial contractions) or the lower chambers (premature ventricular contractions). Many people experience occasional premature beats without any underlying heart disease. Stress, caffeine, alcohol, and lack of sleep can increase their frequency. If premature beats occur frequently or cause symptoms, further investigation may be recommended.

Bradycardia (Slow Heart Rhythm)

An irregular heartbeat can also result from a slow heart rhythm, known as bradycardia. In this situation, the heart beats fewer than 60 times per minute. Slow rhythms may occur because of problems with the heart’s natural pacemaker or electrical conduction system. Symptoms can include fatigue, dizziness, or fainting. Severe cases may require treatment such as pacemaker implantation.

Heart Block

Heart block occurs when electrical signals are delayed or interrupted as they travel from the upper chambers to the lower chambers of the heart. Depending on the severity, this can lead to missed beats or a slow and irregular pulse. Mild forms may cause no symptoms, while more serious types can cause fainting or severe dizziness. Diagnosis usually involves ECG monitoring and sometimes longer term rhythm recording.

Other Possible Causes

Not every irregular heartbeat is caused by a heart condition. Several non cardiac factors can also influence heart rhythm. These include stress, anxiety, dehydration, thyroid disorders, infections, electrolyte imbalances, and certain medications. Excess caffeine or alcohol can also trigger palpitations. In these situations, treating the underlying cause often resolves the irregular rhythm.

How Irregular Heartbeats Are Diagnosed

Diagnosing the cause of an irregular heartbeat usually begins with an ECG, which records the heart’s electrical activity. If the irregular rhythm occurs intermittently, longer term heart rhythm monitoring may be required. This involves wearing a small device for 24 hours or longer to capture rhythm changes during normal daily activity. An echocardiogram may also be performed to assess heart structure and valve function. Blood tests can help identify contributing factors such as thyroid imbalance or electrolyte changes.

When Should You Seek Medical Advice?

You should consider medical assessment if you experience frequent palpitations, dizziness, breathlessness, chest discomfort, or fainting. Even if symptoms are mild, repeated episodes warrant investigation. Sudden palpitations accompanied by severe chest pain, collapse, or stroke symptoms require urgent emergency care.

You can contact us here to arrange a consultation if you are concerned about an irregular heartbeat. At West Kent Cardiology Partnership, we provide detailed rhythm assessment and personalised treatment plans for patients across Kent and East Sussex.

Why Early Assessment Matters

Many arrhythmias are manageable when detected early. Identifying conditions such as atrial fibrillation allows treatment that significantly reduces stroke risk. Even when symptoms turn out to be harmless, having them assessed provides reassurance and removes uncertainty. Monitoring heart rhythm over time also helps identify patterns and guide future care.

Conclusion

An irregular heartbeat can have many possible causes. While some are harmless, others may indicate conditions such as atrial fibrillation, atrial flutter, supraventricular tachycardia, heart block, or other arrhythmias. Understanding the cause of an irregular rhythm is essential for appropriate treatment and long term heart health.

We are proud to support patients across Kent and East Sussex with thorough heart rhythm assessment and clear guidance. If you are experiencing palpitations or concerns about your heartbeat, you can call us on 01892 526726 to arrange a specialist consultation and take the next step towards reassurance and effective care.