Tachycardia

I was entering a heart rate into the electronic PCR and I mistakenly typed “848.” The program has automatic error detection and the field turned red, as if angry with me or calling me stupid.

“Can you imagine a heart rate that fast?” I mumbled to myself as I corrected it. (Forgive me; it was the middle of the night.)

And then, out of curiosity, I wondered if the program had a range for allowable heart rates. I put my mouse pointer over the field.

“Heart rate can only be between 0 and 500.”

Five hundred? Can you imagine?

Supposedly, hummingbirds’ hearts can beat up to more than 1200 times a minute.

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