A 65-year-old male c/o chest pain and sweating since last one day. The pain was moderate, below xiphisternum. One episode of vomiting. BP is 170/100, Pulse - 98. No H/O - DM, HTN. No similar F/H.

No past illnesses. He is a heavy labourer in the farm field. Below is ECG report. Which investigations required? Suggest further line of treatment.