Final answer:
Digoxin can cause changes in the ECG that include T wave inversion, decreased T wave amplitude, or a bi-phasic T wave, reflecting its influence on the myocardial cells during the repolarization phase represented by the T wave.
Step-by-step explanation:
The question pertains to the effect of Digoxin on T waves as seen in an electrocardiogram (ECG). To understand this, it's important to note that the T wave on an ECG represents the repolarization of the ventricles. T waves can appear flatter when insufficient oxygen is delivered to the myocardium. Digoxin, a cardiac glycoside used in the treatment of heart conditions, can induce changes in the ECG. These changes can include T wave inversion, a decrease in T wave amplitude, or a bi-phasic T wave. Although not specific to calcium ion concentration, Digoxin's effect on ECG is due to its action on the myocardial cells, altering the electrophysiological properties and impacting the repolarization phase that the T wave signifies.