What should you know about stress and atrial fibrillation?

Atrial fibrillation is an irregular heart rhythm. Stress can increase adrenaline, heart rate and awareness of an uneven beat, and an episode may feel more noticeable during a stressful period. Stress alone does not establish the rhythm’s cause. [Palpitations](/symptoms/palpitations/) can also arise from other rhythm problems, stimulants, illness or thyroid disorders. An [Electrocardiogram](/treatments/diagnostics-and-screening/ecg/) records the heart rhythm and may help confirm what is happening.

Record when symptoms begin, how long they last, and whether they follow poor sleep, alcohol, illness, caffeine or emotional strain. Take prescribed medicines as directed and do not change an anticoagulant without medical advice. A clinician may review pulse, blood pressure, medicines and stroke-risk factors. Good sleep, hydration and paced breathing may reduce strain, but they do not replace rhythm assessment or prescribed treatment.

Call emergency services for palpitations with chest pain, severe breathlessness, fainting, marked weakness or new confusion. Sudden facial drooping, arm weakness or trouble speaking may indicate a [Stroke](/conditions/stroke/) and needs immediate help. Seek prompt assessment for a first episode, a very fast or persistent irregular pulse, or worsening [Dizziness](/symptoms/dizziness/).

Ask whether your symptoms need an ECG or monitoring, which triggers matter for you, and how to take your medicines safely. If atrial fibrillation is confirmed, ask why [Anticoagulation Management](/treatments/medical-management/anticoagulation-management/) may be recommended and what bleeding signs require advice.