Heart Palpitations: Online Assessment and When to Seek Urgent Care

When heart palpitations are a medical emergency

Call 112 now, or go straight to emergency care, if palpitations come with any of the following: chest pain, pressure or tightness; severe breathlessness; fainting or a blackout, or feeling you are about to pass out; palpitations that are fast and do not stop after a few minutes; or palpitations alongside weakness or drooping on one side, or difficulty speaking. Do not book a video appointment for these. Remote care cannot perform the ECG or monitoring that an urgent rhythm problem needs, and these symptoms can signal a heart or circulation emergency that is treated fastest in person.^[5]

Can an online doctor help with heart palpitations?

This is an important honesty point that a booking button should never blur. The value of an online consultation here is triage and direction, not a promise to fix a rhythm from a screen. The doctor can tell you whether your description fits the reassuringly common patterns, whether it points to a treatable cause such as an overactive thyroid, and exactly which test, if any, you should have and how quickly. That is genuinely useful, and it is different from treatment.

What are heart palpitations?

Palpitations are an awareness of your own heartbeat. People describe them as a thump, a flutter, a skipped or extra beat, a pounding, or a short run of very fast beats. You might feel them in the chest, the throat or the neck. Noticing your heartbeat is common and, on its own, is usually not a sign of heart disease.^[1] Often the sensation is simply the normal heart being felt more keenly at a quiet moment, after exercise, or when you are anxious, tired or have had too much caffeine.

What the doctor wants to understand is the character of the episodes: whether the rhythm feels regular or irregular, how fast it goes, how suddenly it starts and stops, how long it lasts, what you were doing when it happened, and above all whether anything worrying happens alongside it. Those details do most of the diagnostic work, which is why a structured history taken by video is a good first step even though the heart itself cannot be recorded remotely.

What causes heart palpitations?

The large majority of palpitations have a benign explanation. Common triggers and causes include:

• Caffeine and stimulants: coffee, strong tea, energy drinks, and pre-workout or high-dose caffeine supplements are among the most common triggers.
• Stress, anxiety and panic: a racing or pounding heart is a core physical symptom of anxiety and panic attacks, and it is one of the most frequent reasons people feel palpitations.
• Alcohol and nicotine: a heavy drinking session, and smoking or vaping, both provoke palpitations in many people.
• Exercise and adrenaline: feeling the heart pound during or just after exertion is normal.
• Fever and illness: a high temperature raises the heart rate, so palpitations often accompany infections; being unwell with a fever or dehydrated during an illness such as the flu can make the heart race.
• Hormones: palpitations are common in pregnancy, around the menopause, and before periods.
• An overactive thyroid: too much thyroid hormone speeds the heart and is a well-recognised, treatable cause worth testing for.^[3]
• Medicines and stimulant drugs: some inhalers, decongestants, thyroid medicines and recreational stimulants can all trigger palpitations.
• A genuine arrhythmia: in a minority, palpitations are due to an abnormal heart rhythm such as atrial fibrillation or a supraventricular tachycardia, which is exactly what an ECG or monitor is for.^[2][4]

Because anxiety, caffeine and hormones account for so many cases, reassurance after a proper assessment is often the most valuable outcome. But reassurance has to be earned by asking the right questions and checking for the features that move a case up the list, not assumed.

When should I worry about palpitations?

Seek urgent care for palpitations that come with chest pain, breathlessness, fainting or near-fainting, as covered in the emergency box above. Short of that, arrange a prompt assessment if palpitations are new and frequent, last a long time, start and stop very abruptly with a fast regular beat, or feel irregular and sustained. Also take them more seriously if you have a known heart condition, or a family history of heart rhythm problems or unexplained sudden death at a young age.^[1]

The reassuring pattern is the opposite: occasional single skipped or extra beats, brief flutters with an obvious trigger like coffee or a stressful moment, palpitations only at rest that vanish with activity, and nothing else happening alongside them. Even then, if they bother you, an assessment is reasonable, because knowing is better than worrying.

What the doctor checks in an online heart palpitations assessment

The consultation is a structured history designed to sort benign palpitations from those needing tests. In a palpitations assessment the doctor will typically check:

• The rhythm and speed: whether beats feel regular or irregular, and roughly how fast, sometimes by asking you to tap out the beat.
• Onset and offset: whether episodes start and stop gradually or switch on and off like a light, which points towards particular rhythms.
• Duration and frequency: seconds, minutes or longer, and how often they occur.
• Associated symptoms: chest pain, breathlessness, dizziness, fainting or sweating, which are the features that change the urgency.
• Triggers: caffeine, alcohol, nicotine, stimulant supplements, exercise, stress, illness or lack of sleep.
• Your health background: thyroid problems, anaemia, existing heart disease, and any family history of sudden cardiac death.
• Your medicines and any stimulants: including inhalers, decongestants and recreational drugs.
• Any readings you already have: a pulse from a smartwatch or fitness tracker, a blood-pressure reading, or a single-lead trace if your device records one, which can add useful clues although they do not replace a medical ECG.

How doctors triage palpitations

This is the heart of what an online consultation can and cannot do for palpitations, so it is set out plainly rather than as a sales pitch.

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Availability of individual medicines and who may prescribe them vary by country; your doctor confirms what applies where you are.

Why a remote consultation cannot replace an ECG

An electrocardiogram (ECG) records the heart's electrical activity, and it is the test that actually captures a rhythm. The catch with palpitations is that they come and go, so even an in-person ECG may be normal between episodes. That is why doctors often arrange ambulatory monitoring: a device worn for 24 hours, several days, or longer, to catch an episode as it happens.^[2] None of this can be done through a video call. What the online doctor does is decide whether you need this testing and how urgently, and set it in motion, so you are not left either ignoring something that matters or worrying about something that does not.

Consumer smartwatches that record a single-lead trace have made this area more nuanced. Such a trace can occasionally be a helpful pointer, and if your watch has flagged an irregular rhythm it is worth mentioning. But these are screening tools, not diagnostic ECGs, and a normal watch reading does not rule out a problem. The doctor will weigh any device data alongside your history rather than relying on it.

Managing palpitations while you are assessed

What you can do yourself

For palpitations with a benign pattern, the most effective steps are practical: cut back on caffeine and energy drinks and see whether episodes settle, moderate alcohol, stop smoking and vaping, keep well hydrated, and protect your sleep. If stress or anxiety is the driver, slow breathing during an episode and longer-term steps to manage anxiety genuinely reduce how often palpitations intrude. Keeping a simple diary of when episodes happen, what you had eaten or drunk, and what else was going on, gives the doctor far more to work with.

When medicines are considered

There is no medicine that a doctor should prescribe simply to silence palpitations before their cause is understood. Where an assessment and testing identify a specific rhythm problem or a driver such as an overactive thyroid, treatment is directed at that diagnosis, and some rhythm problems are managed with medicines such as beta-blockers or with procedures, decided by a cardiologist. A prescription is never issued without a consultation, and for a suspected arrhythmia the responsible path is assessment and the right test first, not a remote prescription. Your doctor explains what applies to your situation and where prescribing rules differ by country.

Special situations

Palpitations in pregnancy

The heart works harder in pregnancy, and feeling it beat more forcefully or quickly is common and usually benign. It still deserves assessment, particularly if palpitations are frequent, come with breathlessness beyond the ordinary, or with dizziness or fainting, because a small number of pregnancy-related heart issues need proper evaluation. Tell the doctor how many weeks pregnant you are.

Palpitations and the menopause

Palpitations are a recognised part of the menopause transition, often alongside hot flushes and disturbed sleep. They are generally harmless, but the same rule applies: new, frequent or symptom-laden palpitations are worth a check to exclude thyroid problems and rhythm disorders before putting them down to hormones.

Palpitations and anxiety

Anxiety and palpitations feed each other: the sensation triggers worry, and worry raises adrenaline, which drives more palpitations. Recognising this loop is part of the treatment, and it does not mean the symptom is imagined. A doctor can confirm there is no dangerous rhythm and, where anxiety is the driver, point you towards approaches that ease it.

When we assess palpitations online, and when we refer you

We assess online: occasional or recurrent palpitations without red flags, to take a proper history, identify triggers, and reassure where the picture is clearly benign; palpitations that need directing to the right test, where the doctor arranges an ECG or a heart monitor; and palpitations with a likely treatable cause such as thyroid overactivity, anaemia or anxiety, which can be investigated and managed.

We refer or redirect you: any palpitations with chest pain, breathlessness, fainting or near-fainting, which are emergencies;^[2] palpitations in someone with known heart disease or a family history of sudden cardiac death, which need cardiology; and any episode that requires an ECG or monitoring to diagnose, which can only be done in person. In those cases the consultation gets you to the right test and the right specialist quickly, rather than offering a treatment we cannot safely provide from a screen. Palpitations can also accompany other common illnesses our doctors assess online, where fever or dehydration is the real driver.

How Mobi Doctor works

1. Book a time that suits you: open daily 7am–11pm. Most patients speak to a doctor within about 15 minutes of their booked time. no subscription, exact price up front.
2. Speak to a licensed doctor about heart palpitations: a private video call: you describe what you feel, the doctor asks what matters, and you agree the right plan together.
3. Get your assessment and next steps: testing or a prescription arranged after the call where right for you; if we cannot help online, you get a full refund.

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