A nurse is educating the family of a client who has Alzheimer's disease. The nurse should be sure to communicate that which of the following behavioral manifestations can occur in clients with Alzheimer’s disease? (Select All that Apply.)

A. Decreased circulation to the kidneys: Post-cardiac arrest syndrome (PCAS) is a constellation of systemic ischemia/reperfusion injury responses that occur after return of spontaneous circulation (ROSC) following cardiac arrest. One of the manifestations of PCAS is decreased circulation to the kidneys due to the systemic hypoperfusion that occurs during cardiac arrest and the subsequent reperfusion injury that follows ROSC. This can lead to acute kidney injury (AKI) in some cases.

B. Increased mental capacity: While it is crucial to monitor neurological status after cardiac arrest, an immediate increase in mental capacity is not typically indicative of PCAS. Rather, neurological assessment may involve evaluating for signs of brain injury or dysfunction, which can include altered mental status, confusion, or neurological deficits.

C. Improving respiratory function: Improvement in respiratory function after cardiac arrest is a positive sign but may not necessarily indicate the development of PCAS. PCAS primarily involves systemic responses to the ischemia/reperfusion injury that occurs during and after cardiac arrest, rather than isolated respiratory changes.

D. Improvement in heart rate and blood pressure: Improvement in heart rate and blood pressure after cardiac arrest is generally expected with successful resuscitation efforts. However, these improvements alone may not necessarily indicate the development of PCAS. PCAS involves a broader range of systemic responses beyond just cardiac and hemodynamic changes.

A. Muscular aches in the leg: Muscular aches in the leg are not typically indicative of an impending cardiac arrest. While leg pain or cramping can be associated with peripheral vascular disease or venous insufficiency, they are not specific signs of cardiac arrest.

B. Profound fatigue: Profound fatigue can be a warning sign of an impending cardiac arrest. Fatigue or weakness can result from inadequate blood flow to the heart muscle, which may occur prior to a cardiac event. Additionally, systemic effects of cardiovascular compromise can lead to generalized weakness and fatigue.

C. Severe headache: While severe headache can be associated with conditions such as hypertension or intracranial bleeding, it is not a typical manifestation of an impending cardiac arrest. Headaches may occur as a result of stress or anxiety related to the cardiac event, but they are not a direct warning sign of impending cardiac arrest.

D. Ringing in the ears: Ringing in the ears, also known as tinnitus, is not typically associated with an impending cardiac arrest. Tinnitus can result from various factors such as noise exposure, ear infections, or certain medications, but it is not considered a warning sign of impending cardiac arrest.