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Tachycardia

Tachycardia is when your heart beats faster than normal while you are at rest. For adults, this usually means a resting heart rate above 100 beats per minute. It can happen occasionally without causing problems, but frequent or sustained tachycardia may be a sign of an underlying heart condition.

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There are different types, including atrial fibrillation, atrial flutter, supraventricular tachycardia (SVT), and ventricular tachycardia.

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What are the symptoms of Tachycardia?

 

Some people have no symptoms, while others may notice:

  • Rapid heartbeat or pounding in the chest

  • Shortness of breath

  • Dizziness or lightheadedness

  • Fainting or near-fainting

  • Chest pain or discomfort

  • Fatigue

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Symptoms can vary depending on the type and cause of tachycardia.

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What increases my risk of Tachycardia?

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You may be more at risk if you:

  • Have heart disease or a history of heart problems

  • Have high blood pressure

  • Have thyroid disorders

  • Smoke

  • Drink large amounts of alcohol or caffeine

  • Use stimulant drugs

  • Experience frequent stress or anxiety

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How is Tachycardia diagnosed?

 

Your cardgiologist will ask about your symptoms and may check your heart rate and rhythm. Tests can include:

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  • Electrocardiogram (ECG) – to record heart rhythm and identify the type of tachycardia

  • Holter monitor – a portable ECG worn for 24–48 hours

  • Event monitor – worn longer to capture occasional episodes

  • Echocardiogram – to assess heart structure and function

  • Blood tests – to check for thyroid problems, anaemia, or electrolyte issues

  • Electrophysiology study – to assess the heart’s electrical system

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What is the treatment for Tachycardia?

 

Treatment depends on the cause and type. Options may include:

  • Lifestyle changes: avoiding caffeine, alcohol, and smoking; managing stress

  • Medication: to slow the heart rate or control rhythm

  • Cardioversion: an electric shock to reset the heart rhythm

  • Catheter ablation: to destroy small areas of heart tissue causing abnormal signals

  • Surgery or devices: such as a pacemaker or implantable cardioverter defibrillator (ICD) in certain cases

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More information:

For further details, visit the NHS Tachycardia page or the British Heart Foundation.

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