A stroke occurs when a blood clot blocks a blood vessel or artery, or when a blood vessel breaks and interrupts blood flow to an and bleeding occurs into an area of the brain. Every stroke is different.
ETA Chlorophyll works on the Liver and probably works a little. No it really doesn't, you are not a plant. Tea will oxygenate the blood. No it won't Also don't do as someone else said and drink liquid oxygen, that's really not a good idea.
Just fill a glass bottle and find total volume. Divide by 3, and fill with that much water. Mark that spot as it will be 1/3, This will be the for the oxygen since it combines in a 1:2 ratio with hydrogen. The other 2/3 are of course for the hydrogen. Simply fill the whole container with water and invert in water. Let pure oxygen bubbles displace the water as they rise into the container until the gas fills up to the 1/3 line. Then switch to hydrogen gas to fill the remaining space. Plug the hole before removing, then light the gas with a flame source.