Drug-induced Cardiotoxicity -Jon Ford, MD The following is a response to an educational ECG series from the UC Davis EM Residency Program which is led by Dr. Bryn Mumma. The ECG showed a widened QRS with a prolonged QTc due to a multi-agent overdose. Dr. Ford, who I like to refer to as our toxicology program's Program Director Emeritus, provided this mental model for drug-induced cardiotoxicity. As you have pointed out, this is a complicated ECG. I will admit that when I looked at it, my ey...