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
In syndrome X, patients have all of the following except- 
Select and explain. 
A. Angina like chest pain, B. Ischemic ST segment depression, C. Abnormal coronary aeriogram, D. Excellent prognosis choice in
C: Abnormal coronary aeriogram
Answer: C: Abnormal coronary aeriogram 
Explanation: Cardiac syndrome X (CSX) is typical anginalike chest pain with evidence of myocardial ischemia in the absence of flow-limiting stenosis on coronary angiography. Cannon et al termed this entity, characterized by a decrease in coronary flow reserve without epicardial aery stenosis, microvascular angina. Ref Harrison 20th edition pg 1435