Palpitations: Causes, Tests, and When to Worry

Have you ever felt your heart suddenly race, flutter, or seem to skip a beat — maybe while lying in bed at night? That sensation is called palpitations. Most of the time it’s tied to stress, stimulants like caffeine, or temporary rhythm changes. But if palpitations are new, keep coming back, or show up alongside warning signs, it’s important to get checked.

Overview

Palpitations are sensations that make a person unusually aware of their heartbeat. The heart may feel fast, strong, irregular, fluttery, or as if it has skipped or added an extra beat. Some people notice palpitations in the chest, while others feel them in the throat, neck, or while lying down at night.

Most of the time, palpitations aren’t dangerous. Caffeine, emotional stress, poor sleep, exercise, or dehydration can all set them off. But they can also come from heart rhythm disorders, thyroid disease, anemia, medication effects, or other medical conditions — which is why the pattern of your symptoms, what comes with them, and your health history all matter.

A careful medical assessment can help distinguish harmless extra beats from rhythm problems that need treatment. The goal is not only to detect abnormal heart rhythms, but also to identify reversible triggers and reassure patients when no serious cause is found.

What Palpitations May Feel Like

People describe palpitations in different ways. Some feel a rapid heartbeat that starts suddenly and then stops. Others notice a brief thump followed by a pause, which can happen with premature beats. Palpitations may last seconds, minutes, or longer, and they may occur at rest, during activity, after meals, or when trying to sleep.

Pay attention to the details: how fast your heart feels, whether the rhythm seems regular or irregular, how long the episode lasts, and what you were doing when it started. You might also notice sweating, trembling, nausea, lightheadedness, chest discomfort, or shortness of breath. These clues help your doctor narrow down the likely cause.

Palpitations that are brief and occur occasionally in an otherwise healthy person are often benign. Still, new palpitations, frequent episodes, or symptoms that interfere with daily life deserve medical attention, especially in people with known heart disease or a family history of sudden cardiac death.

Common Causes and Risk Factors

Palpitations can come from the heart itself or from conditions that make the heart beat faster or more forcefully. Common non-cardiac triggers include stress, panic attacks, fever, dehydration, low blood sugar, anemia, thyroid overactivity, pregnancy, menopause, and poor sleep. Stimulants such as caffeine, nicotine, energy drinks, and some recreational substances can also provoke symptoms.

Medicines and supplements can be part of the picture too. Some cold and flu preparations, asthma inhalers, decongestants, weight-loss products, thyroid medicines, and certain herbal supplements can raise the heart rate or trigger palpitations in susceptible people. Don’t stop a prescribed medicine on your own — but do tell your doctor about everything you take, supplements included.

Heart-related causes include premature atrial or ventricular beats, supraventricular tachycardia, atrial fibrillation, atrial flutter, ventricular tachycardia, valve disease, cardiomyopathy, and previous heart attack. Risk is higher in people with existing heart disease, high blood pressure, diabetes, sleep apnea, significant electrolyte imbalance, or a family history of inherited rhythm disorders.

• Common triggers: caffeine, alcohol, nicotine, stress, lack of sleep, and dehydration.
• Medical contributors: thyroid disease, anemia, fever, pregnancy, and electrolyte changes.
• Heart causes: extra beats, atrial fibrillation, supraventricular tachycardia, and less commonly more serious rhythm disorders.

Diagnosis and Tests

The evaluation begins with a medical history and physical examination. The doctor will ask about the timing, duration, frequency, triggers, and associated symptoms. It is helpful for patients to describe whether the rhythm feels regular or irregular and to note any connection with exercise, caffeine, meals, stress, or position changes. A pulse reading from a smartwatch or blood pressure device may be useful, but it does not replace a medical assessment.

An electrocardiogram, often called an ECG or EKG, records the heart’s electrical activity at one moment in time. It can detect rhythm abnormalities, signs of previous heart injury, conduction problems, and clues to inherited rhythm conditions. Because palpitations may not happen during the office visit, a normal ECG does not always rule out a rhythm problem.

Ambulatory monitoring may be recommended when symptoms are intermittent. A Holter monitor records continuously for one or more days, while event monitors, patch monitors, or implantable loop recorders can be used for less frequent symptoms. The aim is to match the patient’s symptoms with the heart rhythm at that exact time.

Additional tests may include blood tests for thyroid function, anemia, electrolytes, kidney function, or infection when clinically appropriate. An echocardiogram uses ultrasound to assess heart structure and valve function. Exercise stress testing may be considered if palpitations occur with exertion, and specialist electrophysiology evaluation may be needed for complex or recurrent rhythm disorders.

Treatment Options

Treatment depends on the cause, severity, and frequency of palpitations. If symptoms are linked to lifestyle triggers, reducing caffeine or alcohol, improving sleep, staying hydrated, and managing stress may be enough. Treating underlying conditions such as anemia, thyroid disease, fever, sleep apnea, or electrolyte imbalance can also reduce episodes.

When palpitations are caused by a heart rhythm disorder, treatment is individualized. Some rhythm problems only require monitoring and reassurance. Others may be treated with medicines that slow the heart rate, reduce extra beats, or help maintain a normal rhythm. The choice of medication depends on the specific diagnosis, other health conditions, and possible side effects.

In selected cases, procedures may be recommended. Catheter ablation can target small areas of heart tissue responsible for certain abnormal rhythms, such as some supraventricular tachycardias or atrial fibrillation in appropriate patients. People with particular high-risk rhythm disorders may need devices such as pacemakers or implantable cardioverter-defibrillators, but these are used only when clearly indicated.

You and your doctor should decide together. Make sure you understand the likely cause of your symptoms, the benefits and risks of each option, and when you need follow-up. The good news: most people do very well once triggers are found and any underlying problem is treated.

Prevention and Self-Care

Self-care can reduce palpitations for many people, especially when episodes are related to stimulants, stress, or dehydration. Keeping a symptom diary may help identify patterns. Patients can record the time of day, activity, food and drink intake, stress level, sleep quality, medicines, and how long the palpitations lasted.

Healthy heart habits are also useful. Regular physical activity, a balanced diet, adequate hydration, and consistent sleep support cardiovascular health. People who are not used to exercise should start gradually and seek medical advice if palpitations occur with exertion, chest discomfort, or unusual breathlessness.

Managing stress helps too, especially if palpitations show up during anxiety or panic. Slow breathing, mindfulness, relaxation exercises, and counseling can all cut down how often symptoms occur. Just don’t assume anxiety explains everything before a proper medical evaluation — particularly if symptoms are new or come with warning signs.

• Limit or avoid personal triggers such as energy drinks, excess caffeine, nicotine, or alcohol.
• Maintain hydration, particularly during hot weather, illness, or exercise.
• Review over-the-counter medicines and supplements with a doctor or pharmacist.
• Seek help for persistent stress, panic symptoms, or sleep problems.

When to See a Doctor

Book a medical visit if your palpitations are new, keep coming back, are getting more frequent, or simply worry you. This matters most if you have known heart disease, high blood pressure, diabetes, thyroid disease, a pregnancy, or a family history of serious rhythm disorders — or if palpitations are limiting your exercise or daily life.

Urgent assessment is needed if palpitations occur with chest pain, fainting, near-fainting, severe shortness of breath, sudden weakness, confusion, or symptoms suggestive of stroke. A very fast heartbeat that does not settle, especially with dizziness or low blood pressure symptoms, should also be treated as urgent. These signs do not always mean a dangerous condition is present, but they require prompt evaluation.

Patients can prepare for an appointment by bringing a list of medicines and supplements, noting caffeine and alcohol intake, and recording details of episodes. If safe to do so, checking the pulse during symptoms may help determine whether the rhythm is fast, slow, regular, or irregular.

For international patients, Acıbadem Health Point provides access to multidisciplinary cardiology teams and JCI-accredited hospitals where palpitations and heart rhythm disorders can be evaluated and treated. Care should always be guided by a qualified clinician who can assess the individual patient’s symptoms and risks.

Frequently asked questions