Heart Racing? Why Your Heart Is Pounding and Medically Approved Next Steps

Feeling your heart race or pound can be unsettling. In many cases, it's harmless and temporary. In other situations, it may signal tachycardia, the medical term for a faster-than-normal heart rate. Knowing the difference — and understanding what to do next — can help you stay calm and take smart action.

This guide explains why your heart may be racing, when it's normal, when it's not, and what steps doctors recommend.

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What Is Tachycardia?

Tachycardia is defined as a resting heart rate over 100 beats per minute (bpm) in adults.

A normal resting heart rate for most adults is between 60 and 100 bpm. It's normal for your heart rate to rise with:

• Exercise
• Stress or anxiety
• Fear
• Pain
• Fever
• Caffeine or stimulant use

Tachycardia becomes a medical concern when:

• It happens at rest without a clear cause
• It lasts longer than a few minutes
• It causes symptoms
• It keeps coming back

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Why Is Your Heart Racing?

There are many possible causes of a fast heartbeat. Some are harmless. Others need medical attention.

Common, Non-Dangerous Causes

These are frequent and often temporary:

• Stress and anxiety
• Panic attacks
• Caffeine
• Nicotine
• Alcohol
• Dehydration
• Lack of sleep
• Strenuous exercise
• Fever or infection

In these cases, the heart is responding appropriately to a trigger.

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Medical Causes of Tachycardia

Sometimes a racing heart is a sign of an underlying condition, including:

• Heart rhythm disorders (arrhythmias)
• Atrial fibrillation
• Supraventricular tachycardia (SVT)
• Ventricular tachycardia
• Thyroid disorders (especially hyperthyroidism)
• Anemia
• Low blood pressure
• Electrolyte imbalances
• Heart disease
• Medication side effects
• Drug use (including stimulants)

Some forms of tachycardia originate in the upper chambers of the heart (atria). Others start in the lower chambers (ventricles). Ventricular tachycardia is more serious and requires urgent care.

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Symptoms That Can Happen With Tachycardia

Not everyone feels symptoms. But when they do occur, they may include:

• Heart pounding or fluttering
• Chest discomfort
• Shortness of breath
• Lightheadedness
• Dizziness
• Fainting
• Fatigue
• Weakness

If symptoms are severe or sudden, immediate medical care may be necessary.

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When Is a Racing Heart an Emergency?

Call emergency services immediately if a fast heartbeat is accompanied by:

• Chest pain or pressure
• Shortness of breath
• Fainting
• Severe dizziness
• Confusion
• Weakness on one side of the body

These could signal a heart attack, stroke, or dangerous arrhythmia.

Do not ignore these symptoms.

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How Doctors Evaluate Tachycardia

If your heart has been racing without explanation, a doctor may recommend:

1. Physical Exam

• Checking pulse and blood pressure
• Listening to heart sounds

2. Electrocardiogram (ECG or EKG)

• Measures the electrical activity of your heart
• Can detect abnormal rhythms

3. Blood Tests

• Thyroid levels
• Electrolytes
• Anemia screening
• Infection markers

4. Holter Monitor

• A portable ECG worn for 24–48 hours

5. Event Monitor

• Used for intermittent symptoms

6. Echocardiogram

• Ultrasound of the heart to check structure and function

The goal is to determine whether the tachycardia is a normal response — or an abnormal rhythm disorder.

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Medically Approved Next Steps If Your Heart Is Racing

If you are not in immediate danger, here's what experts recommend:

✅ 1. Pause and Assess

Sit down. Take slow, steady breaths.

Try this breathing pattern:

• Inhale for 4 seconds
• Hold for 4 seconds
• Exhale for 6 seconds

Deep breathing can activate your parasympathetic nervous system and help slow your heart.

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✅ 2. Check Your Pulse

Count your pulse for 60 seconds at rest.

• Under 100 bpm → Often normal
• 100–120 bpm → Mild tachycardia
• Above 120 bpm at rest → Needs medical review

If your heart rate remains elevated for more than 10–15 minutes at rest without a clear reason, contact a healthcare provider.

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✅ 3. Hydrate

Dehydration is a common, overlooked cause of tachycardia.

Drink water and see if symptoms improve within 30–60 minutes.

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✅ 4. Avoid Stimulants

Cut back on:

• Caffeine
• Energy drinks
• Nicotine
• Decongestants containing pseudoephedrine

These can trigger or worsen tachycardia.

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✅ 5. Consider a Symptom Check

If you're experiencing a fast beating heart and aren't sure what's causing it, Ubie's free AI-powered symptom checker can help you understand potential causes and determine whether you need urgent care — all before contacting your doctor.

This can help you organize your symptoms and determine whether urgent care is needed.

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✅ 6. Schedule a Medical Appointment

If you experience:

• Recurrent episodes
• Increasing frequency
• Worsening intensity
• New symptoms

Make an appointment with your primary care doctor or a cardiologist.

Early evaluation can prevent complications.

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Treatment Options for Tachycardia

Treatment depends entirely on the cause.

If Caused by Lifestyle Factors:

• Stress management
• Improved sleep
• Hydration
• Reduced caffeine
• Exercise conditioning

If Caused by a Medical Condition:

• Thyroid treatment
• Iron supplementation for anemia
• Adjusting medications

If Caused by Heart Rhythm Disorders:

Doctors may recommend:

• Beta blockers
• Calcium channel blockers
• Antiarrhythmic medications
• Catheter ablation (a procedure to correct abnormal electrical pathways)
• Implantable devices in severe cases

The good news: many forms of tachycardia are highly treatable.

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Can Anxiety Cause Tachycardia?

Yes.

Anxiety and panic attacks frequently cause temporary tachycardia. During stress, your body releases adrenaline, increasing heart rate.

Clues that anxiety may be contributing include:

• Episodes tied to stress
• Tingling in hands
• Rapid breathing
• Sweating
• Feeling of doom

Even when anxiety is the cause, it's still worth getting checked once to rule out medical issues.

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Long-Term Prevention Tips

To reduce episodes of tachycardia:

• Stay hydrated
• Limit caffeine
• Avoid energy drinks
• Exercise regularly
• Maintain a healthy weight
• Manage stress
• Get regular sleep
• Control blood pressure
• Treat thyroid disorders
• Stop smoking

Small changes often make a big difference.

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The Bottom Line

A racing heart can be:

• A normal response to stress
• A temporary issue like dehydration
• A sign of anxiety
• Or a medical condition such as tachycardia

Most cases are not life-threatening — but some are serious and should never be ignored.

If your fast heartbeat is:

• Persistent
• Unexplained
• Severe
• Associated with chest pain, fainting, or shortness of breath

Seek emergency care immediately.

If symptoms are mild but recurring, schedule a medical evaluation. It's always better to check.

You may also use a free fast beating heart symptom checker to help organize your symptoms and gain clarity on possible next steps before your appointment.

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Important Final Advice

This information is educational — it does not replace medical care.

If you experience severe symptoms or anything that feels life-threatening, seek emergency medical attention immediately.

If you have ongoing or recurrent tachycardia, speak to a doctor. Proper evaluation can identify treatable causes and prevent complications.

Your heart is strong — but it deserves attention when it signals something isn't right.