Heart Arrhythmia: Symptoms & Treatment
What Is Heart Arrhythmia?
A heart arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart may beat too quickly, too slowly or irregularly.
Your heart uses electrical signals to coordinate each heartbeat. When those signals do not work as expected, the heart may beat in an unusual pattern. Some rhythm changes are harmless, while others need medical assessment and treatment. (American Heart Association)
Heart arrhythmias can affect people of different ages. They may occur in people with existing heart disease, but they can also develop for other reasons, including certain medicines, thyroid problems or changes in the body’s electrolyte levels.
The most important step is to identify the type of arrhythmia and determine whether it affects the heart’s ability to pump blood effectively.
Types of Heart Arrhythmia
There are several types of heart arrhythmia. Each affects the heartbeat in a different way.
1. Atrial Fibrillation
Atrial fibrillation, also called AF or AFib, is a common type of irregular heartbeat. The upper chambers of the heart receive abnormal electrical signals and beat irregularly.
Some people notice palpitations or tiredness, while others have no obvious symptoms.
Atrial fibrillation matters because it can increase the risk of blood clots and stroke. A healthcare professional may recommend treatment to control the heart rate or rhythm and reduce stroke risk where appropriate. (NICE)
2. Tachycardia
Tachycardia means that the heart is beating faster than expected. A fast heartbeat can be a normal response to exercise, fever or stress. However, an abnormally fast rhythm can also result from an electrical problem in the heart.
The cause, duration and accompanying symptoms help determine whether further assessment is needed.
3. Bradycardia
Bradycardia means that the heart is beating more slowly than expected.
A slow heart rate can be normal in some healthy people, particularly during sleep or in well-trained athletes. However, a slow rhythm may require medical attention if it causes dizziness, fainting, weakness or other symptoms.
4. Supraventricular Tachycardia
Supraventricular tachycardia (SVT) is a group of rhythm disorders that cause episodes of an unusually fast heartbeat originating above the heart’s lower chambers.
Episodes may begin and end suddenly. Some people experience palpitations, breathlessness or lightheadedness.
A healthcare professional can determine whether symptoms are caused by SVT or another condition.
5. Ventricular Arrhythmias
Ventricular arrhythmias begin in the heart’s lower chambers. Some forms can seriously affect the heart’s ability to pump blood.
Certain ventricular rhythms are medical emergencies, particularly when they cause collapse or prevent the heart from pumping effectively.
Not every irregular heartbeat is dangerous, but a new or recurring abnormal rhythm should not be ignored.
What Causes Heart Arrhythmia?
Heart arrhythmia can develop for several reasons. Sometimes, an underlying heart condition is responsible. In other cases, several factors contribute.
Common causes and triggers include:
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High blood pressure
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Coronary artery disease
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Previous heart attack
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Heart valve disease
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Heart failure
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Thyroid disorders
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Changes in blood electrolytes
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Certain medicines
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Inherited heart rhythm conditions
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Alcohol, tobacco and excessive caffeine in some people
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Sleep disorders, including sleep apnoea
Stress, lack of sleep and strenuous activity can also trigger palpitations in some people. However, palpitations do not automatically mean that someone has an arrhythmia. (NHS)
Identifying the underlying cause is an important part of treatment.
For example, a rhythm disturbance linked to a thyroid problem may require treatment of the thyroid condition as well as assessment of the heartbeat.
Symptoms of Heart Arrhythmia
Symptoms vary according to the type of arrhythmia and how it affects the heart.
Some people have no symptoms and discover the condition during a routine examination. Others experience noticeable changes in their heartbeat.
Possible symptoms include:
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A racing or pounding heartbeat
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Fluttering in the chest
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A sensation that the heart has skipped a beat
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Dizziness or lightheadedness
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Unusual tiredness
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Shortness of breath
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Reduced ability to exercise
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Fainting or near-fainting
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Chest discomfort
These symptoms can also occur with other medical conditions, so they cannot confirm an arrhythmia on their own. (NHS)
When Is an Irregular Heartbeat an Emergency?
Seek emergency medical help if palpitations occur with chest pain, difficulty breathing, fainting or severe dizziness. These symptoms may indicate a serious heart problem. (NHS)
Do not wait for an appointment or rely on online advice when these warning signs occur.
How Is Heart Arrhythmia Diagnosed?
Diagnosing heart arrhythmia involves assessing symptoms, medical history and the heart’s electrical activity.
Electrocardiogram (ECG)
An electrocardiogram records the heart’s electrical signals. It can help identify an abnormal rhythm and is often an important first test.
However, an ECG may not detect an arrhythmia if it occurs only occasionally.
Ambulatory Heart Monitoring
If symptoms come and go, a healthcare professional may recommend a portable heart monitor that records the rhythm over a longer period.
The type of monitor and the monitoring period depend on how frequently symptoms occur.
Blood Tests
Blood tests may help identify conditions that contribute to rhythm problems, including thyroid disorders or electrolyte abnormalities.
Echocardiogram
An echocardiogram uses ultrasound to assess the heart’s structure and pumping function. It may be recommended when the healthcare professional needs to investigate possible underlying heart disease.
Further Cardiac Assessment
Depending on the findings, a cardiologist may recommend additional tests or specialised heart monitoring.
NICE recommends an ECG when atrial fibrillation is suspected and an irregular pulse has been detected. Longer monitoring may be needed when an initial ECG does not capture an intermittent rhythm disturbance. (NICE)
Heart Arrhythmia Treatment
Treatment depends on the type of arrhythmia, its cause, the symptoms it produces and the person’s overall health.
Some rhythm disturbances do not require treatment beyond observation. Others need medication, a procedure or a medical device.
The goal is to manage symptoms, address underlying conditions and reduce the risk of complications.
1. Medicines for Heart Rhythm Problems
Healthcare professionals may prescribe medicines to control the heart rate or help maintain a more regular rhythm.
Different medicines work in different ways. Their suitability depends on the type of arrhythmia and the patient’s medical history.
Examples of medicines used in selected rhythm disorders include:
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Amiodarone
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Digoxin
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Metoprolol
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Bisoprolol
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Flecainide
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Propafenone
These medicines are not interchangeable, and not every medicine is suitable for every type of arrhythmia. Some can cause serious side effects or worsen particular rhythm problems if used inappropriately.
A qualified healthcare professional must determine whether a medicine is suitable and oversee its use.
2. Medicines to Reduce Stroke Risk
Some people with atrial fibrillation need anticoagulation treatment to reduce their risk of stroke.
The decision depends on individual stroke and bleeding risks. Not everyone with an irregular heartbeat requires an anticoagulant.
Anticoagulants are different from medicines that directly control the heart’s rhythm. A healthcare professional determines whether either treatment, or both, is appropriate. (NICE)
3. Cardioversion
Cardioversion is a medical procedure used to restore a more regular heart rhythm in selected patients.
It may involve a controlled electrical treatment or medication, depending on the circumstances.
The healthcare team assesses the type of arrhythmia, its duration and other risks before deciding whether cardioversion is suitable.
4. Catheter Ablation
Catheter ablation is a procedure that targets the heart tissue responsible for an abnormal electrical signal.
A specialist guides thin tubes called catheters to the heart and treats the area causing the rhythm problem.
Ablation may be appropriate for certain arrhythmias, particularly when symptoms persist or other treatment is unsuitable.
5. Pacemakers and Other Devices
Some people with certain rhythm disorders need an implanted device.
A pacemaker helps maintain an appropriate heart rate when the heart beats too slowly. An implantable cardioverter-defibrillator (ICD) can detect and treat certain dangerous heart rhythms.
These devices are used for specific medical indications following specialist assessment. (American Heart Association)
Can Lifestyle Changes Help Manage Heart Arrhythmia?
Lifestyle changes can support heart health and may reduce certain arrhythmia triggers. However, they do not replace medical assessment or prescribed treatment when these are needed.
Manage Blood Pressure
High blood pressure can contribute to heart disease and increase the risk of some rhythm disorders.
Regular blood pressure checks and appropriate management can help protect long-term cardiovascular health.
Prioritise Sleep
Poor sleep can contribute to palpitations and may worsen certain underlying conditions. Persistent snoring, interrupted breathing during sleep or excessive daytime tiredness should be discussed with a healthcare professional.
Review Caffeine and Other Triggers
Caffeine affects people differently. Some people notice palpitations after consuming caffeinated drinks, while others do not.
If a particular drink or activity appears to trigger symptoms, discuss the pattern with a healthcare professional rather than assuming it explains the problem.
Avoid Tobacco
Tobacco use damages cardiovascular health and is associated with an increased risk of heart disease.
Avoiding tobacco is an important part of protecting the heart and blood vessels.
Stay Physically Active Appropriately
Physical activity supports overall cardiovascular health. However, people with a diagnosed arrhythmia should discuss any activity restrictions or new exercise plans with their healthcare team, particularly if exercise triggers symptoms.
Review Medicines and Supplements
Some medicines and supplements can affect heart rhythm. Tell your healthcare professional about everything you take, including non-prescription products.
Do not stop a prescribed medicine without discussing it with the prescriber.
The American Heart Association recommends managing cardiovascular risk factors and reviewing medicines and supplements as part of arrhythmia care. (AHA)
What Happens If Heart Arrhythmia Is Left Untreated?
The risks depend on the type of arrhythmia.
Some rhythm disturbances are harmless. Others may affect blood flow, cause fainting or increase the risk of serious complications.
Potential complications of certain arrhythmias include:
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Stroke
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Heart failure
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Reduced ability to exercise
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Recurrent fainting
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Other serious rhythm disturbances
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Cardiac arrest in some high-risk conditions
Atrial fibrillation is particularly important because it can increase the risk of blood clots and stroke. Some ventricular arrhythmias can be life-threatening.
Early assessment helps healthcare professionals identify the type of rhythm problem and decide whether treatment is necessary.
HubPharm Cardiovascular Care: Arrhythmia Medicines
Managing a heart rhythm disorder can involve ongoing monitoring, prescribed medicines and coordinated care. Patients may also have other cardiovascular conditions, such as high blood pressure, heart failure or atrial fibrillation.
HubPharm Africa’s cardiovascular-care service supports patients who need professional pharmacy guidance for long-term cardiovascular treatment.
Medicines associated with arrhythmia management include:
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Propafenone
Each medicine has a different role. Some are used to control heart rate, while others are used to manage particular abnormal rhythms. Their suitability depends on the diagnosis and the patient’s individual circumstances.
These medicines require careful professional oversight because certain antiarrhythmics can cause significant side effects or interact with other medicines.
How HubPharm Supports Cardiovascular Patients
HubPharm’s pharmacy team can support patients by helping them:
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Understand the purpose of their prescribed cardiovascular medicines.
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Recognise the importance of following their clinician’s treatment plan.
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Identify questions about possible side effects or medicine interactions.
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Understand when a concern needs to be referred to a doctor or specialist.
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Manage medication routines as part of ongoing cardiovascular care.
Patients taking several cardiovascular medicines may benefit from professional support to reduce confusion and improve their understanding of their treatment plan.
Need Guidance About Your Cardiovascular Medication?
If you have been diagnosed with a heart rhythm disorder, speak with a qualified healthcare professional about your treatment and monitoring needs.
HubPharm’s pharmacy team can help explain prescribed medicines and provide appropriate guidance within the scope of pharmacy practice.
Important: Do not start, stop or change a heart rhythm medicine without professional advice. If you experience chest pain, fainting or severe difficulty breathing with palpitations, seek emergency medical help.
When Should You See a Doctor About an Irregular Heartbeat?
Arrange a medical assessment if:
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You experience palpitations repeatedly.
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Your heartbeat seems unusually fast or irregular without a clear explanation.
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Symptoms are becoming more frequent.
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You experience dizziness or unusual tiredness alongside palpitations.
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You have an existing heart condition.
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You have a family history of serious heart rhythm problems.
If you experience palpitations with chest pain, shortness of breath, fainting or severe dizziness, seek emergency care immediately. (NHS)
An early assessment can help distinguish harmless palpitations from an arrhythmia that needs treatment.
Frequently Asked Questions About Heart Arrhythmia
What is a heart arrhythmia?
A heart arrhythmia is an abnormality in the rate or rhythm of the heartbeat. The heart may beat too fast, too slowly or irregularly.
Is an irregular heartbeat always dangerous?
No. Some irregular rhythms are harmless, while others need treatment. An ECG and appropriate clinical assessment can help determine the cause and significance.
What are the most common symptoms of heart arrhythmia?
Symptoms may include a racing or fluttering heartbeat, dizziness, tiredness, breathlessness or fainting. Some people have no symptoms.
Can stress cause heart arrhythmia?
Stress can trigger palpitations in some people. However, recurrent or unexplained palpitations should be assessed rather than automatically attributed to stress.
Can heart arrhythmia be treated?
Yes. Depending on the type, treatment may include monitoring, medicines, cardioversion, catheter ablation or an implanted device. Some people do not need active treatment.
Does every person with atrial fibrillation need blood thinners?
No. Anticoagulation decisions depend on individual stroke and bleeding risks. A healthcare professional should assess whether treatment is appropriate.
Can heart arrhythmia cause a stroke?
Certain arrhythmias, particularly atrial fibrillation, can increase the risk of stroke by allowing blood clots to form in the heart.
When is an irregular heartbeat an emergency?
Palpitations accompanied by chest pain, difficulty breathing, fainting or severe dizziness require emergency medical attention.
Which doctor treats heart arrhythmia?
A general doctor can perform an initial assessment and arrange appropriate tests. A cardiologist, and sometimes a specialist in heart rhythm disorders called an electrophysiologist, may manage more complex cases.
The Bottom Line
Heart arrhythmia describes a heartbeat that is too fast, too slow or irregular. Although some rhythm changes are harmless, others can increase the risk of stroke, heart failure or other serious complications.
The best approach is to identify the type of arrhythmia, investigate possible causes and follow an appropriate care plan. Treatment may involve monitoring, prescribed medicines, procedures or medical devices.
Do not ignore recurring palpitations or unexplained changes in your heartbeat. Seek medical assessment, and obtain emergency help if palpitations occur with chest pain, difficulty breathing, fainting or severe dizziness.
Medical Disclaimer
This article is for general health education and does not replace an individual assessment by a doctor, pharmacist or other qualified healthcare professional. Diagnosis and treatment of heart arrhythmia depend on the specific rhythm disorder, underlying conditions and individual clinical risks.
References
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American Heart Association. Arrhythmia.
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American Heart Association. Prevention and Treatment of Arrhythmia.
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American Heart Association. What Are the Symptoms of Atrial Fibrillation?.