It’s a busy Tuesday afternoon at your cardiology practice. You’ve just finished with your last scheduled patient when your nurse peeks into your office.

“Doctor, sorry to interrupt, but there’s a walk-in, a Mr. Jacob. He looks quite unwell. He says he passed out this morning.”

You take a quick look at the clock. You have a meeting in an hour, but this sounds serious. “Show him in,” you say, already clearing your desk.