1 If a lot of blood leaks out, it can cause a buildup of pressure in the brain because the brain is enclosed in the skull. There is no room for brain tissue to expand, and so the leaked blood can compress and kill important areas of the brain.  Hemorrhagic strokes tend to be more serious than ischemic strokes.
Horizontal definition, at right angles to the vertical; parallel to level ground. See more.
Horizontal means going left and right. This is the opposite of vertical, which means going up and down. Example: This sentence is written horizontally. It might help to know that the horizon is the farthest limit of the earth that can be seen from a given point.owever Vertical is perpendicular to horizontal. Horizontal (left to right or the x axis on a grid) Ve â¦ rtical (up to down or the y axis on a grid) The opposite of left to right is right to left. the opposite of y is-y. 8 people found this useful.