[lo_zamoyski]

Nurses/healthcare professionals often take the patient's blood pressure and heart rate just as soon as they enter the room after walking and moving about. Wait a few minutes and the measurement changes significantly, giving you a better indication of actual heart rate at rest.

[Feathercrown]

I went in for a checkup and my doctor actually retested me after a few minutes because the first reading was unnaturally high. Hurrying into the office and the general anxiety of being in a hospital certainly raises it by a bit.