A nurse is assessing a client who has Lewy body dementia. The nurse should recognize that which of the following is responsible for changes in thinking, communication, movement, and emotional processing in Lewy body dementia?

A. Poor functional ability: While poor functional ability may impact the overall prognosis and quality of life for a client with a subarachnoid hemorrhage (SAH), it is not directly associated with a high mortality rate. Functional ability can be improved with rehabilitation and supportive care.

B. Rebleeding of the injury: Rebleeding of the SAH is a significant risk factor associated with a high mortality rate. Rebleeding can lead to increased intracranial pressure, worsening neurological deficits, and even death. Preventing rebleeding is a critical aspect of managing SAH to improve outcomes.

C. Decreased cerebrospinal fluid: Decreased cerebrospinal fluid (CSF) may indicate conditions such as hydrocephalus, which can complicate the management of SAH. However, it is not directly associated with a high mortality rate compared to rebleeding.

D. Use of nimodipine: Nimodipine is a calcium channel blocker commonly used in the management of SAH to prevent cerebral vasospasm, which can lead to ischemia and worsen outcomes. While nimodipine plays a role in improving outcomes by preventing vasospasm, its use is not directly associated with mortality rates.

A. "Since my parent suffered from Alzheimer's disease, I know that I am at an increased risk for developing the disease myself." This statement is accurate. Family history is a significant risk factor for Alzheimer's disease. Individuals with a first-degree relative (such as a parent or sibling) with Alzheimer's disease are at a higher risk of developing the condition themselves.

B. "The cause of Alzheimer's disease is still not fully known or understood." This statement is also accurate. While there are theories about the underlying causes of Alzheimer's disease, such as genetics, brain changes, and environmental factors, the exact cause is still not fully understood. Research into the etiology of Alzheimer's disease is ongoing.

C. "I do not have to worry about this because I do not have Down syndrome and I have never had a stroke." This statement indicates a need for further teaching. While it is true that individuals with Down syndrome and those who have had a stroke are at increased risk for developing Alzheimer's disease, they are not the only populations at risk. Alzheimer's disease can affect individuals without Down syndrome or a history of stroke. Other risk factors include age, family history, genetics, and lifestyle factors.

D. "My child is at risk for developing Alzheimer's disease because they have trisomy 21." This statement is accurate. Trisomy 21, also known as Down syndrome, is associated with an increased risk of developing Alzheimer's disease. Individuals with Down syndrome have three copies of chromosome 21, which contains the gene for amyloid precursor protein (APP). Overproduction of amyloid beta protein, derived from APP, is thought to contribute to the development of Alzheimer's disease in individuals with Down syndrome.