润色：When the vulnerable plaque in the carotid artery develops ulcers and floating blood clots it can be confirmed as plaque rupture

When the vulnerable plaque in the carotid artery develops ulcers and floating blood clots, it can be confirmed as plaque rupture. This occurrence poses a significant risk as it can lead to the blockage of blood flow to the brain, resulting in a stroke. Therefore, prompt identification and treatment of plaque rupture are crucial in preventing potentially devastating consequences.