Today marks
the anniversary of my second Ischemic stroke which was a massive one. It was caused by torn carotid
artery. Here is a definition: “Carotid artery dissection is a
separation of the layers of the artery wall supplying oxygen-bearing blood to
the head and brain, and is the most common cause of stroke in young
adults.”
Further research tells more of my stroke story:
“Once considered uncommon, spontaneous carotid artery dissection is an
increasingly recognized cause of stroke that preferentially affects the
middle-aged. Arterial dissection of the carotid arteries occurs when a small
tear forms in the innermost lining of the arterial wall (known as the tunica
intima). Blood is then able to enter the space between the inner and outer
layers of the vessel, causing narrowing (stenosis) or complete occlusion. The
stenosis that occurs in the early stages of arterial dissection is a dynamic
process and some occlusions can return to stenosis very quickly. When complete
occlusion occurs, it may lead to ischaemia.
Often, even a complete occlusion is totally asymptomatic because bilateral
circulation keeps the brain well perfused. However, when blood clots form and
break off from the site of the tear, they form emboli, which can travel through
the arteries to the brain and block the blood supply to the brain, resulting in
an ischaemic stroke, otherwise known as a cerebral infarction. Blood clots, or
emboli, originating from the dissection are thought to be the cause of
infarction in the majority of cases of stroke in the presence of carotid artery
dissection. Cerebral infarction causes irreversible damage to the brain. In one
study of patients with carotid artery dissection, 60% had infarcts documented
on neuroimaging.”
It still does not seem possible that it happened to me.
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