How does hypoventilation affect the blood's pH?

a. Hemiparesis: Both

1. Higher fatality rate: Hemorrhagic CVA
2. Rupture of vessel: Hemorrhagic CVA
3. Loss of blood flow: Ischemic CVA
4. Most common: Ischemic CVA
5. Altered sensorium: Both

Rationale: A cerebrovascular accident (CVA), or stroke, is a sudden interruption of blood supply to the brain, resulting in neurological damage. There are two main types of stroke: ischemic and hemorrhagic. Ischemic stroke occurs when a blood clot or plaque blocks an artery that supplies blood to the brain, causing tissue death due to lack of oxygen and nutrients. Hemorrhagic stroke occurs when a blood vessel in the brain ruptures, causing bleeding into the brain tissue or the surrounding space. Both types of stroke can cause hemiparesis (weakness on one side of the body), altered sensorium (changes in consciousness, alertness, or orientation), and other neurological deficits depending on the location and extent of the damage. However, hemorrhagic stroke has a higher fatality rate than ischemic stroke because of the increased risk of intracranial pressure, cerebral edema, and brain herniation. Ischemic stroke is more common than hemorrhagic stroke, accounting for about 87% of all strokes.

Osmolarity is a measure of the concentration of solutes in a solution. When the osmolarity of the bloodstream increases due to blood loss, water will move from areas of lower osmolarity to areas of higher osmolarity by osmosis. This means that water will move from the extracellular fluid (the fluid outside the cells) to the intracellular fluid (the fluid inside the cells) to balance the osmotic pressure. As a result, the extracellular fluid volume will decrease and the intracellular fluid volume will increase, causing the cells to expand.