How to use this section? This is a quick refresher on ECGs commonly seen in the ED. We have provided one-liner introductions to each, and the answers are below the ECG. For those looking for a challenge, cover up the answer and quiz yourself. 1. ECG – Tachyarrhythmias ECG Cases Questions – What is the ECG and your next step? [bg_faq_start] Case 1 25-year-old male. Feels very anxious watching the news. Very worried …