What effect does digoxin have on the EKG?

Digoxin is a medication commonly used in the management of heart conditions such as atrial fibrillation and heart failure. One of the hallmark changes it induces in the electrocardiogram (EKG) is the characteristic "scooped" appearance of the ST segment.

This “scooping” is a result of digoxin's effect on the myocardium and its interaction with cardiac electrical activity. Digoxin increases intracellular calcium concentrations, which can alter repolarization patterns. This modification causes the ST segment to display a distinct concave upward shape, setting it apart from the typical straight line seen in a normal EKG trace.

This particular change can assist healthcare providers in identifying digoxin toxicity or monitoring patients on digoxin therapy. Recognizing this unique feature is essential for interpreting EKGs accurately in patients taking the medication. Thus, the presence of a scooped ST segment is a direct indicator of digoxin's influence on cardiac electrical activity.