1. Transient ischemic attack (TIA) involves a blood clot that typically reverses on its own.
2. Ischemic stroke involves a blockage caused by either a clot or plaque in the artery. The symptoms and complications of ischemic stroke can last longer than those of a TIA, or may become permanent.
3. Hemorrhagic stroke is caused by either a burst or leaking blood vessel that seeps into the brain.