It is a humid Tuesday evening in the Emergency Department. You are the attending physician overseeing the resuscitation bay. As you finish yet another cup of coffee, the paramedics wheel in a stretcher at a run.

“Hey Doc, this is Jennifer Young, a 58-year-old female, collapsed at home,” the paramedic reports. “She was dyspneic for two days, then syncope today. She’s hypoxic and hypotensive.”