Digoxin: clinical highlights: a review of digoxin and its use in contemporary medicine

Michael Ehle1, Chandni Patel, Robert P Giugliano

  • 1From the Departments of *Pharmacy and †Cardiovascular Medicine, Brigham and Women's Hospital, Boston, MA.

Insights

Optimizing digoxin dosing using patient factors like age, weight, and kidney function is key. Recognizing digoxin overdose and using digoxin immune globulins ensures safe and effective cardiac care.

Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Digoxin is a long-standing cardiac medication with complex pharmacokinetics.
  • Its narrow therapeutic index presents challenges in managing atrial arrhythmias and heart failure.

Purpose of the Study:

  • To outline strategies for safe and effective digoxin use.
  • To emphasize patient-specific dosing and recognition of toxicity.

Main Methods:

  • Review of digoxin's pharmacokinetic profile.
  • Analysis of factors influencing digoxin efficacy and toxicity.
  • Guidance on recognizing and managing digoxin overdose.

Main Results:

  • Patient-specific dosing (age, lean body weight, renal function) minimizes toxicity.
  • Early recognition of digoxin overdose is crucial for timely intervention.
  • Digoxin immune globulins are effective in reversing toxicity.

Conclusions:

  • Understanding digoxin's properties is essential for safe clinical practice.
  • Personalized digoxin dosing improves patient outcomes.
  • Effective management of digoxin toxicity enhances patient safety.

Related Concept Videos

Heart Failure Drugs: Inotropic Agents01:26

Heart Failure Drugs: Inotropic Agents

Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers01:12

Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of the heart's...
Therapeutic Drug Monitoring: Drug Analysis Methods01:26

Therapeutic Drug Monitoring: Drug Analysis Methods

Therapeutic Drug Monitoring (TDM) is a clinical practice that measures specific drug levels in a patient's blood or body tissues to tailor drug therapy effectively. This monitoring is critical for managing drugs with narrow therapeutic indices like digoxin and phenytoin, ensuring they are both safe and effective. For instance, monitoring theophylline levels in asthma patients involves precision and sensitivity to adjust doses according to individual responses to therapy, ensuring efficacy and...
Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers01:22

Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers

Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...