WEBVTT 00:00:00.110 --> 00:00:02.130 A blood clot or embolus, 00:00:02.140 --> 00:00:04.280 can form and break off from the heart. 00:00:05.190 --> 00:00:08.020 The clot travels through the bloodstream 00:00:08.170 --> 00:00:11.070 where it can lodge in the artery of the brain, 00:00:12.130 --> 00:00:14.220 blocking the flow of oxygen-rich blood. 00:00:15.060 --> 00:00:18.280 The lack of oxygen results in damage, destruction, 00:00:18.290 --> 00:00:23.100 or even tissue death of the brain beyond the affected area. 00:00:24.010 --> 00:00:26.070 The result is a stroke.