Lanoxin

Definition

Lanoxin is the brand name for digoxin, a cardiac glycoside used to treat various heart conditions including atrial fibrillation and heart failure. It works by increasing the force of myocardial contraction and modulating electrical conduction in the heart.

5 Must Know Facts For Your Next Test

1. Lanoxin has a narrow therapeutic index, making careful monitoring of blood levels essential.
2. It primarily affects the atrioventricular (AV) node by slowing conduction and prolonging the refractory period.
3. Common side effects include nausea, vomiting, dizziness, and visual disturbances such as yellow or blurred vision.
4. Hypokalemia increases the risk of digoxin toxicity, which can lead to life-threatening arrhythmias.
5. Lanoxin is contraindicated in patients with ventricular fibrillation or those with known hypersensitivity to digoxin.

Review Questions

• What are the primary clinical uses of Lanoxin?
• Why is it important to monitor blood levels in patients taking Lanoxin?
• How does hypokalemia affect patients on Lanoxin?

Related terms

Atrial Fibrillation: A common type of arrhythmia that Lanoxin is used to treat.

Cardiac Glycosides: A class of organic compounds that increase cardiac output and are used in heart failure treatment.

Digoxin Toxicity: A potentially life-threatening condition due to high levels of digoxin characterized by gastrointestinal and neurological symptoms as well as arrhythmias.