I was in the final stages of preparing for my MRCEM exam in Emergency Medicine, while also working as a Medical Officer in the Accident and Emergency Department of a tertiary-care hospital.Our hospital stood a little outside the city, so the late-night hours were usually quiet. Cardiac patients were rare; if one did arrive, we gave first aid and referred them to a nearby cardiac centre.One morning, around 5:30 a.m., a 35-year-old woman was rushed in, a known hypertensive with heart disease, gasping for breath. On assessment, she was pulseless, with no cardiac activity. I started CPR immediately and asked one of the staff, more experienced with intubation, to pass…