During a home visit, a client informs the nurse about feeling like the heart is skipping beats. When reviewing the client's record, the nurse notes that the client is taking hydrochlorothiazide. Based on these assessment data, the nurse plans to obtain a blood sample to check for which condition?

A. Accommodation: Mydriatic eye drops cause dilation of the pupils, but they do not directly affect the eye's ability to accommodate or focus on near objects. Therefore, accommodation may still be functional, though it can be affected indirectly due to the dilated pupils.
B. Pupillary constriction: Mydriatic eye drops are designed to dilate the pupils, so they inhibit or prevent pupillary constriction. This is the primary purpose of these drops, so pupillary constriction will not occur during their therapeutic effect.
C. Refraction: Refraction refers to the bending of light as it passes through the eye to focus on the retina. This function is generally maintained even when mydriatic drops are used, though changes in pupil size can affect the amount of light entering the eye.
D. Eye convergence: Convergence involves the inward movement of both eyes toward each other to maintain single binocular vision when focusing on a close object. While mydriatic drops primarily affect pupil dilation, convergence can still occur, though it may be affected by the degree of dilation.

A. Low-density lipoprotein (LDL): Atorvastatin's primary effect is to decrease LDL cholesterol levels. A decrease in LDL levels would indicate the medication is working as intended, not an increase.
B. Prothrombin time (PT): PT is a measure of blood clotting, which is not directly affected by atorvastatin. This value is more relevant for monitoring anticoagulant therapy.

C. Creatine phosphokinase (CK): CK levels can be used to monitor for muscle damage or side effects related to statin use. An increase in CK levels would suggest muscle damage, not the effectiveness of the statin.
D. High-density lipoprotein (HDL): Atorvastatin is a statin medication used to lower cholesterol levels, particularly low-density lipoprotein (LDL) cholesterol, which is a key target in reducing the risk of coronary artery disease (CAD). While the primary goal of atorvastatin is to lower LDL cholesterol, an increase in HDL cholesterol (often termed "good" cholesterol) is also desirable as it can help reduce the risk of CAD. Therefore, an increase in HDL is a positive indicator that the medication is having a beneficial effect.