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
Which test is performed to detect stunned (reversible) myocardial ischemia? 
Select and explain. 
A. Coronary angiography., B. PET scan, C. ECG, D. Resting echocardiography
B: PET scan
Answer: B: PET scan 
Explanation: Ans. B. PET scana. PET scan is a type of nuclear scan.b. LV dysfunction can be due to non-contractile or hypercontractile segments that are viable but are chronically ischemic (Hibernating Myocardium).