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: Medicine
Pulsus Bigeminus is seen in therapy with 
Select and explain. 
A. Digitalis, B. Beta blockers, C. ACE inhibitors, D. Calcium channel blockers
A: Digitalis
Answer: A: Digitalis 
Explanation: o Pulsus Bigeminus is recognized as a cause of digitalis toxicity.
o Pulsus Bigeminus is a disorder of rhythm (irregular rhythm; arrhythmia) most commonly caused by Premature Ventricular Contracons that results in a pulse with irregular rhythm that alternates in amplitude (pressure) from beat to beat.
The most common cause of Pulsus Bigeminus is Digitalis and Pulsus Bigeminus is recognized as a cause of digitalis toxicity :