This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
Features in our of ventricular tachycardia are all the following except 
Select and explain. 
A. AV dissociation, B. Capture/fusion beat, C. Good response to carotid sinus massage, D. A history of myocardial infarction
C: Good response to carotid sinus massage
Answer: C: Good response to carotid sinus massage 
Explanation: Features in our of ventricular tachycardia are the D/D of broad complex tachycardia : History of Myocardial Infarction AV dissociation (pathognomonic) Capture/fusion beats (pathognomonic) Extreme left axis detion Very broad QRS complexes No response to carotid sinus massage or IV adenosine Ref - Harrison&;s internal medicine 20e pg1750