This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Wide QRS complex is typically seen in 
Select and explain. 
A. Bundle branch block, B. Sick sinus syndrome, C. Mobitz Type I block, D. Mobitz Type II block
A: Bundle branch block
Answer: A: Bundle branch block 
Explanation: The differential diagnosis of wide-complex tachycardia includes ventricular tachycardia , PSVT with bundle branch block aberrancy, and preexcited tachycardia (see above). In general, these should be managed as ventricular tachycardia until proven other- wise. If the tachycardia is regular and the patient is stable, a trial of intravenous adenosine is reasonable. Ref Harrison 20th edition pg 1443