Arrhythmia

Arrhythmia is an abnormal heart rhythm caused by a problem with the heart’s electrical signals. The heartbeat may be too fast, too slow, or irregular. Some rhythm changes are harmless and cause no symptoms, while others need medical evaluation and treatment. Arrhythmia can affect people of any age, including those with or without known heart disease.

Arrhythmia symptoms vary depending on the type of rhythm and how long it lasts. Some people have no noticeable symptoms, but new, persistent, or worsening symptoms should be assessed by a healthcare professional.

Arrhythmia develops when the heart’s electrical impulses are generated incorrectly or do not travel through the heart normally. Heart disease, other medical conditions, medicines, substances, and inherited electrical problems can all affect this signaling. The cause of a cardiac arrhythmia is sometimes temporary, but some arrhythmias are linked to ongoing heart conditions.

Non-modifiable risk factors

Potentially modifiable risk factors

Many arrhythmias are manageable, especially when the cause is identified and treated. However, a sustained or untreated abnormal rhythm can reduce how effectively the heart pumps blood or allow blood to pool and form clots. The risk of complications varies widely by the type, duration, and cause of the heart arrhythmia.

Diagnosis starts with a review of symptoms and medical history, including when symptoms occur and what they feel like. A clinician may check the pulse and perform a physical examination before selecting tests. The testing plan depends partly on how often symptoms occur and helps identify the rhythm pattern, possible causes, and associated heart problems.

Treatment depends on the arrhythmia type, symptoms, underlying cause, and risk of complications. Some low-risk arrhythmias need observation and lifestyle changes only, while others require treatment of an underlying condition or direct control of the heart rate or rhythm.

Regular follow-up helps monitor whether treatment is working and whether the arrhythmia has returned. Take medicines as prescribed, and discuss supplements or over-the-counter medicines with a clinician because some can affect heart rhythm or interact with treatment.

Not every arrhythmia can be prevented, particularly those caused by inherited conditions or structural heart disease. However, controlling cardiovascular risk factors and avoiding known triggers may lower the risk of some arrhythmias or reduce episodes of an irregular rhythm.

The outlook for arrhythmia depends on the rhythm type, its cause, symptoms, response to treatment, and whether structural heart disease is present. Some rhythms are harmless and temporary, while others are chronic but manageable with medicines, procedures, or devices. Ongoing follow-up is especially important when an arrhythmia has a higher risk of recurrence or complications.

Arrange a medical appointment for new, recurrent, or unexplained palpitations, an unusually slow or fast pulse, dizziness, or fainting. You should also seek medical advice for these symptoms if you have known heart disease or a family history of serious arrhythmias.