embolic stroke of undetermined source

Embolic stroke of undetermined source occurs when a clot or debris travels through the bloodstream and blocks a brain artery, causing a stroke, but doctors can't find the exact origin of the clot. Unlike strokes linked to known conditions like heart problems or artery disease, this type has no clear cause despite testing. It suggests there may be hidden or subtle factors, making it challenging to prevent. Timely diagnosis helps guide appropriate treatment to reduce future stroke risk.