Digoxin Test

Digoxin Test measures the level of the drug digoxin in the blood. Digoxin is a drug used for the treatment of heart failure and abnormal heartbeats. Heart failure, including congestive heart failure (CHF), occurs when the heart is less effective at pumping and circulating blood throughout the body.

This further results in backflow of the blood to the hands, legs, feet, liver and lungs. The symptoms of this flow back of blood are shortness of breath, swelling and fatigue.

Digoxin is generally prescribed to relieve some of the symptoms associated with heart failure. The drug helps strengthen the contractions of the heart muscles and helps the heart pump blood with greater efficiency.

Digoxin also helps control abnormal heart rhythms, a condition known as arrhythmia. However, it does not completely cure heart failure.

The digoxin values in blood need to be monitored closely because it has a narrow safety range. When the level of digoxin is too low, the symptoms may recur, while if the level of digoxin is high, it may lead to toxicity.

A digoxin test means checking the digoxin level in the blood and determining whether it falls within the safe range. Additionally, the dosage of digoxin is adjusted based on the levels reflected in the digoxin test reports.

The prevalence of heart diseases and heart failure in India is quite high. About 1% of the population undergoes heart failure every year. However, heart transplants are becoming common nowadays, along with new drugs that help manage heart ailments.

Dizziness, mental disturbance, nausea, vomiting

The Digoxin Test is used to diagnose the level of digoxin in the blood. This test is prescribed for individuals undergoing digoxin therapy to ensure the correct dosage. The drug takes one to two weeks to reach a steady level in the heart and the blood. This test result helps determine whether the correct amount of drug is being used. Once the dose is determined, routine monitoring is done to monitor if the level of the drug is steady in the blood.

The results of the Digoxin Test help the doctor to modify or use the same dosage of the drug for treating the symptoms of heart failure.

A Digoxin Test may be prescribed if, after taking the drug, the following symptoms occur:

• Shortness of breath
• Oedema
• Fatigue
• Diarrhoea
• Vomiting
• Loss of appetite
• Difficulty in breathing
• Irregular heartbeat
• Dizziness

The digoxin levels change if there is a change in health status. Digoxin tests are done if an individual has the following health conditions:

• Kidney problem
• Cancer
• Stomach problem
• Thyroid problem
• Intestinal problem

The Digoxin Test is not a routine test. A doctor prescribes the digoxin test of the blood after an individual is put on digoxin therapy. This helps regularly monitor the digoxin level in the blood and determine whether the digoxin test result corresponds to the safe range.

If the level of the drug does not fall within the normal range of digoxin in the blood, the dosage of the drug needs to be changed by the doctor.

Before the Test

Before undergoing the Digoxin test, your doctor will likely not require any special precautions. However, if you need to take this test along with another that requires special preparation, your doctor may recommend fasting for a specific time. The blood must be drawn 6 to 8 hours after the last dose of digoxin. The person collecting the blood needs to know the time when the last dose was taken.

During the Test

For the Digoxin Test, a phlebotomist will draw a blood sample from a vein of your arm. Here's what will happen during the test:

• The likely puncture site will be sterilised with antiseptic.
• A tourniquet will be secured around your arm to make your veins stand out.
• A needle will be inserted into a chosen vein to draw the blood. This may cause a brief pinch for a few seconds.
• The blood will be collected in a vial/small test tube, and a label will be affixed with your details.

After the Test

Following the blood collection:

• A bandage will be applied to stop the bleeding at the insertion site.
• You may notice bruising at the puncture site. If you feel lightheaded, you should sit and rest for a few minutes.
• If you notice persistent bleeding, pain, or if rashes develop at the puncture site, contact your doctor.

The only parameter that the Digoxin Test report includes is monitoring digoxin levels in the blood. The level of digoxin must be optimal in the blood for the treatment of heart failure. When the level of digoxin is low, it leads to recurrence of the symptoms of heart failure, while a high digoxin level leads to toxicity.

The Digoxin Test report readings can vary depending on the sex, test method, medical history and other conditions. If the results fall outside the normal range of the digoxin test, doctors might advise changing the dosage of the drug accordingly.

The Digoxin Test helps measure the level of the heart failure treatment drug digoxin in the blood. A high level of digoxin in the blood leads to toxicity, which can, in turn, lead to life-threatening conditions. Whereas, a low level of the drug leads to the recurrence of heart failure symptoms.

Doctors prescribe this test after an individual undergoes digoxin therapy to monitor the level of the drug in the body. The results of the digoxin blood test determine whether the level of digoxin is within the normal range. If the level is increased or decreased, doctors need to change the dosage of the drug.

The Digoxin Test is thus important for people undergoing digoxin therapy for a heart condition. Any changes in the level of the drug are harmful to the body and can be detected from several symptoms.

After the initial digoxin dosage is determined, patients undergoing digoxin therapy are advised to undergo regular tests for digoxin level monitoring to ensure the value of digoxin in the blood falls within the normal range.

The Digoxin Test, a commonly performed blood test, carries very few risks of complications. Consult your physician if you experience:

• Persistent bleeding at the puncture site
• Redness, swelling, or pain at the needle insertion site.

Limitations of the test

• Potential inaccuracies due to equipment malfunction or human error
• Misinterpretation of markers which may lead to an inaccurate reading and report