Final answer:
A client on furosemide and digoxin experiencing visual disturbances like halos and bright lights is likely to have a lab result indicating low potassium levels, or hypokalemia, due to the diuretic effects of furosemide and the increased risk of digoxin toxicity.
Step-by-step explanation:
If a client is prescribed furosemide and digoxin for the treatment of heart failure and reports seeing halos and bright lights, a likely anticipated laboratory result would be a low potassium level.
Furosemide is a loop diuretic that is often used to treat congestive heart failure by reducing the volume of interstitial and intracellular fluid - this can lead to hypokalemia, which is an abnormally decreased blood level of potassium. This condition is important because potassium is critical for proper cardiac function, and hypokalemia can increase the risk of digoxin toxicity, as these two medications interact. Digoxin toxicity can cause visual disturbances such as halos and bright lights.
In summary, the presence of symptoms like seeing halos and bright lights in a patient taking furosemide and digoxin likely suggests hypokalemia.