Marty and the humorous EKG

So I was sitting in an examination room at my Doctor's office last Friday as he listened to my heart. He held the stethoscope in one spot on my chest and listened. He moved it across my sternum and listened more closely. He asked me to breathe deeply, and listened more. He told me to hold my breath, and listened intently. He then put the stethoscope down, and went to the door. I heard him say, "Nurse, please bring the EKG cart".
On his return I asked with no small concern, "Why do you want the EKG cart?"
"Well, your pulse is a bit slow. Not dangerously slow, but enough that I'd like to do an EKG," he explained.
"Okay, fine," I replied, relieved. "But could I ask you something?
"Of course."
"Maybe next time you do that, tell me what's up before asking for the EKG machine?"
He smiled sheepishly and said, "Yes, sorry. I should have done that."
No real worries on my part. He's a great doctor and I'm very glad to have him. Good thing too that I discovered him after the Obamacare mandates, because that means I can actually keep him. It was simply a bit of a shock to hear the order for the EKG without knowing why, that's all. But I think we both saw it as the humorous inadvertence that it was, and nothing more.
The EKG was good by the way. I do have a functioning heart.