Silent AFib Can Raise Stroke Risk Fivefold, Doctors Warn

Atrial fibrillation, or AFib, is a problem with the heart’s rhythm.

The upper parts of the heart do not squeeze normally.

Some people feel tired, dizzy, breathless or notice a racing heartbeat.

Others feel almost nothing and may not know they have it.

AFib can make a stroke about five times more likely.

Doctors can look for it with an ECG or longer heart monitoring.

Some smartwatches can also help detect irregular heartbeats.

Treatments include medicines, procedures and controlling conditions such as high blood pressure and diabetes.

Doctors say people should not assume unusual tiredness or breathlessness is simply ageing or anxiety.