Serum Digoxin Concentration (Mass Concentration)

Why This Test Is Done

Your doctor may order this test if you’re taking digoxin for heart problems, such as atrial fibrillation or heart failure. It’s often done to check if your medication levels are within the right range to prevent side effects like low heart rate or nausea while ensuring it works properly.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for a few hours before the test, but your doctor will let you know if that applies. Bring any medications you’re currently taking, as they can affect results.

How the Test Is Performed

A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a slight pinch, but it usually doesn’t cause discomfort afterward. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results are compared to a reference range specific to digoxin, which can vary slightly depending on the lab and patient factors. Too much digoxin can cause symptoms like dizziness or irregular heartbeat, while too little may mean the medication isn’t working as intended.