This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Most sensitive method of non invasive monitoring of cardio-vascular ischemia in perioperative period is 
Select and explain. 
A. NIBP, B. ECG, C. Pulse oximeter, D. TEE
D: TEE
Answer: D: TEE 
Explanation: Two-dimensional TEE is the most sensitive method to detect myocardial ischemia and air embolism in peri-operative periodDetection of regional wall motion abnormality a rapid and more sensitive indicator of myocardial ischemia that is the ECG.Decreased systolic wall thickening may be more reliable index for ischemia than endocardial wall motion abnormality alone.(Refer: Morgan and Mikhail's Clinical Anaesthesiology, 5th edition, pg no.1211)