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: Surgery
ECG Change seen in Pulmonary embolism is: 
Select and explain. 
A. S1 Q3 T3, B. S1 Q3 T1, C. S3 Q3 T1, D. S3 Q1 T3
A: S1 Q3 T3
Answer: A: S1 Q3 T3 
Explanation: A large S wave in lead I, Q wave in lead II and inverted T wave in lead III is seen in Pulmonary embolism because of acute Right heart strain.