A simple explanation, the heart pump pushes oxygen rich blood through the arterial system at tremendous pressures. So it will take a considerable blockage to stop it. So how do clots form? Tracing an artery it is seen that its diameter shrinks as it penetrates the brain so a tiny piece of plaque will pass through the artery, till it is very thin and affecting a small part of the brain, where is clots, causing a stroke of minor intensity.
A larger piece of plaque clots in the artery with larger diameter effecting a mid-sized part of the brain inducing stroke of medium intensity.
So, closer to where the artery enters the brain, and thus provides a major part with oxygen. A clot of larger plaque here induces a stroke of major intensity.
There are, of course, innumerable shades of stroke intensity between the two postulated ends.
I also know that there are interconnected systems of arteries which I ignored. So what? A clot is a clot wherever it is and it should be dissolved. Besides this is a simple story. Further explanations may or may not arise. My effort has sufficed as true. Disclosure. My physio says my stroke is of medium intensity.
Angus
P.S. Marcus “What do you make of this lot?” and to my sub-editors “How would you rescue this lot from the waste bin” be kind.
Angus
