A 22-year-old man was brought in by paramedics after an episode of syncope at home. On arrival he was in severe respiratory distress, extremely pale and dripping with sweat. BP is 125/70, HR is 80bpm, RR 40, SaO2 95% on 15L O2 via NRB. Portable CXR in resus is normal.

His ECG is shown. What findings can be interpreted from the ECG? *This case is from the Docplexus Editorial Team and is meant for educative purpose only.