This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Murmurs, Subject name: Medicine
What is electrical storm? 
Select and explain. 
A. > 3 episodes of ventricular tachycardia within 24 hours, B. > 3 episodes of atrial tachycardia within 24 hours, C. Electromechanical dissociation, D. Electrical alternans
A: > 3 episodes of ventricular tachycardia within 24 hours
Answer: A: > 3 episodes of ventricular tachycardia within 24 hours 
Explanation: Electrical storm: Condition in which patient develops recurrent V. tachycardia. Cut off >3 episodes of V.T within 24 hrs. Option C: Electromechanical Dissociation: Terminology used to describe rupture hea which causes pulseless BP|| Option D: Electrical alternans- Variations in QRS amplitude in conditions - C. tamponade