A 90-year-old lady was  presented with chest pain which had a sudden onset in the middle of the night. There were no other symptoms. She had never experienced similar pain before. There was no other relevant medical history. She was not on any medication.

Physical examination revealed no abnormalities. The ECG is shown in figure 1 and fig 2 (standard calibration). What could be the diagnosis based on her ECG findings? *This case is from Docplexus Editorial Team for Educational Purpose only.