This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
All of the following are ECG changes seen in Digoxin toxicity except 
Select and explain. 
A. QT shortening, B. PR shortening, C. ST depression, D. T wave inversion
B: PR shortening
Answer: B: PR shortening 
Explanation: Digoxin is a AV Nodal blocker and hence it leads to PR prolongation not shortening.