A nurse is reviewing a client’s laboratory results and sees that their hemoglobin A1C is 9. Which of the following statements from the nurse is appropriate?

Choice A Reason:

Coronary arteries do not become more elastic with age. Instead, they tend to become less elastic due to the buildup of plaque, a condition known as atherosclerosis. This buildup narrows the arteries and restricts blood flow, which can lead to coronary artery disease (CAD). The heart not receiving enough oxygen is a result of this narrowing, not increased elasticity.

Choice B Reason:

Coronary arteries decrease in diameter due to the buildup of plaque, which consists of fats, cholesterol, and other substances. This narrowing restricts the flow of blood, oxygen, and nutrients to the heart muscle, leading to symptoms such as chest pain (angina) and shortness of breath. This is the primary mechanism behind coronary artery disease.

Choice C Reason:

This choice is essentially a repetition of Choice B and is correct for the same reasons. The narrowing of the coronary arteries due to plaque buildup leads to insufficient blood flow, causing the heart muscle to receive less oxygen and nutrients.

Choice D Reason:

Manifestations of coronary artery disease are not due to the dilation of coronary arteries. Instead, they are due to the narrowing of these arteries. Increased blood flow and pressure are not typical causes of CAD symptoms. The primary issue is the restricted blood flow due to narrowed arteries.

Choice E Reason:

While it is true that the heart and coronary arteries can weaken over time, leading to poor perfusion and angina, this statement does not accurately describe the primary mechanism of coronary artery disease. The main issue in CAD is the narrowing of the arteries due to plaque buildup, which restricts blood flow to the heart muscle.

The correct answer is a) Serum potassium levels.

Choice A reason:

Serum potassium levels are crucial to monitor in clients with hypervolemia, ketoacidosis, and metabolic acidosis. Potassium imbalances are common in these conditions due to shifts between intracellular and extracellular compartments. In diabetic ketoacidosis (DKA), for example, insulin deficiency and acidosis cause potassium to move out of cells, leading to hyperkalemia. However, once treatment with insulin begins, potassium shifts back into cells, which can cause hypokalemia. Both hyperkalemia and hypokalemia can have serious cardiac implications, making it essential to monitor and manage potassium levels closely.

Choice B reason:

Serum calcium levels are important for overall health, but they are not the primary concern in the context of hypervolemia, ketoacidosis, and metabolic acidosis. While calcium imbalances can occur, they are less common and less immediately life-threatening compared to potassium imbalances. Monitoring calcium is still necessary, but it does not require the same level of immediate intervention.

Choice C reason:

Serum sodium levels are also important to monitor, especially in conditions like hypervolemia where fluid balance is disrupted. However, sodium imbalances are typically managed through fluid management and do not pose the same immediate risk as potassium imbalances in the context of ketoacidosis and metabolic acidosis. Hyponatremia or hypernatremia can cause neurological symptoms, but these are generally less acute compared to the cardiac risks associated with potassium imbalances.

Choice D reason:

Blood urea nitrogen (BUN) levels provide information about kidney function and hydration status. Elevated BUN can indicate dehydration or renal impairment, which are relevant in the context of hypervolemia and ketoacidosis. However, BUN levels do not require the same level of immediate intervention as potassium levels. Monitoring BUN is important for overall management but is not the primary concern in acute settings.