Palpitations: when a racing heart worries you

Noticing your own heartbeat — racing, pounding, or skipping — has a simple name: a palpitation. It’s an extremely common sensation, and in most cases it’s nothing serious: stress, coffee, poor sleep or physical exertion are often enough to explain it. The body normally produces heartbeats we never notice; a palpitation is simply the moment that rhythm becomes noticeable, sometimes because it has shifted slightly. That said, certain circumstances deserve a cardiologist’s opinion, especially when the sensation comes with other symptoms or becomes frequent.

Usually, a harmless cause

Coffee, tea, alcohol, nicotine and certain medications can all slightly speed up the heart rate and make it noticeable. Stress and anxiety play a very common role: a rush of adrenaline from an upsetting moment, an exam, or even unexpected good news is enough to make the heart "pound" for a few minutes. Fatigue, sleep deprivation, dehydration, a heavy meal, or unusual physical exertion round out the list of common causes. In women, hormonal changes — periods, pregnancy, menopause — are also classic and, in themselves, harmless triggers.

In these situations, the palpitation usually lasts a few seconds to a few minutes, stays isolated, and rarely comes with a genuine feeling of faintness. It doesn’t automatically require urgent care, but if it worries you or keeps recurring, mentioning it to your doctor is always worthwhile.

When it’s worth investigating properly

Certain features change the picture and justify a medical opinion, generally within the following days rather than as an absolute emergency:

• palpitations that recur regularly, without an obvious trigger;
• episodes that last a long time or come with unusual breathlessness;
• a personal or family history of heart disease, or a known cardiovascular risk factor (high blood pressure, diabetes, cholesterol);
• a repeated feeling of the heart "skipping" a beat.

In these cases, a cardiology consultation checks whether a heart rhythm disorder needing specific treatment might be involved.

Signs that call for urgent care

Some palpitations warrant immediate attention, at the emergency department or by calling 112: a palpitation accompanied by faintness, loss of consciousness or a strong dizzy spell, associated chest pain, marked breathlessness at rest, or an extremely fast and irregular rhythm that doesn’t settle quickly. These signs can point to a significant heart rhythm disorder, and in that context, it’s far better to seek care promptly than to let the situation carry on.

How a cardiologist investigates palpitations

The first step is often an ECG in the office, which captures the heart’s electrical activity at that exact moment — useful if it happens to catch an episode, but often normal between episodes, which rules nothing out. This is where the holter monitor comes in: a small device worn for 24 to 48 hours, sometimes longer, connected to electrodes stuck to the chest, continuously recording heart rhythm through everyday activity. The patient notes the time of any symptoms in a diary or via a button on the device, allowing the cardiologist to match the sensation felt with exactly what the heart was doing at that moment.

Depending on the results, an echocardiogram, blood tests (including thyroid function, since an overactive thyroid speeds up the heart), or further investigations may complete the assessment. In most cases investigated this way, the holter shows nothing concerning — which is itself valuable, reassuring information.

Care pathway in Luxembourg

The GP is often the first point of contact for assessing palpitations and deciding whether referral to a cardiologist is needed. The cardiologist prescribes and interprets the holter monitor and any further tests required. Consultations, the ECG and holter monitoring are covered by the Caisse nationale de santé under the usual reimbursement rules; details are available at cns.lu. Occasionally feeling your heart beat harder is almost never a sign of serious disease, but a medical opinion always helps confirm that and move forward with peace of mind.