Atrial fibrillation and stroke

The irregular rhythm can let blood pool in an upper chamber of the heart. Stroke prevention is therefore a separate part of atrial fibrillation care from controlling pulse or palpitations.

A clinician considers age, previous stroke or transient ischaemic attack, high blood pressure, diabetes, heart failure, blood-vessel disease, and other individual factors when deciding whether anticoagulation is appropriate. How noticeable the irregular heartbeat feels does not reliably show clot risk.

Some people have intermittent atrial fibrillation and feel normal between episodes. An electrocardiogram or longer rhythm monitoring may be needed to document it, while brain imaging and other urgent tests are used when stroke is suspected.

If an anticoagulant is prescribed, take it consistently and get advice for missed doses, procedures, falls, or bleeding. Do not substitute aspirin or stop treatment because the pulse feels regular; protection depends on the clinical plan, not symptoms alone.

Managing blood pressure, diabetes, smoking, sleep apnoea, alcohol intake, and other cardiovascular conditions also supports prevention. Keep follow-up appointments so kidney function, interactions, side effects, and the continuing balance between clot and bleeding risk can be reviewed.

Call emergency services for sudden facial droop, weakness or numbness on one side, speech difficulty, loss of vision, severe imbalance, confusion, or an abrupt severe headache. Note when the person was last known to be well and do not drive them to hospital yourself.

Call even if the symptoms clear, because a transient ischaemic attack also needs urgent assessment. Do not give food, drink, aspirin, or an extra anticoagulant while waiting unless an emergency clinician specifically instructs you to do so.

Ask how your clot and bleeding risks were assessed, why a particular anticoagulant was chosen, which medicines or supplements may interact, and what bleeding requires urgent help. Confirm whom to contact before dental work, surgery, or a planned interruption of treatment.