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
Atrial fibrillation is seen in all except: 
Select and explain. 
A. Constrictive pericarditis, B. Atrial septal defect, C. Mitral stenosis, D. Ventricular septal defect
D: Ventricular septal defect
Answer: D: Ventricular septal defect 
Explanation: None