I am afraid so.
When the clot blocks the blood flow to the heart or the brain, a heart attack or stroke can follow.
Ischemic strokes happen when a blood clot or a fatty deposit blocks an artery supplying blood to the brain. Around 80% of all strokes are ischemic in origin. The remaining 20% of strokes are hemorrhagic, where an artery bursts. These can be caused by an aneurysm, a bulge or weakness in the wall of a blood vessel.
All of us have clotting factors in our blood to ensure we do not bleed to death if we cut ourselves. But conditions like hypertension, atherosclerosis and some other blood problems can lead to the development of blood clots. Thrombosis is the name given to the formation of blood clots. An embolism occurs when a blood clot travels around the body and lodges in an organ.