What is the origin of the idiom "get one's pulse racing" and when to use it?

The origin of the idiom "get one's pulse racing" can be traced to the physiological response of the human body to excitement or arousal. The concept of measuring one's pulse or heart rate has long been associated with gauging physical and emotional states. This phrase can be used metaphorically to describe any situation or experience that elicits strong emotions, anticipation, or a sense of thrill.