What is the origin of the idiom "one's heart skip a beat" and when to use it?

The origin of the idiom "one's heart skip a beat" is difficult to trace with certainty. However, it likely emerged from the connection between strong emotions and the physiological response of the heart. It can be used to describe encounters with unexpected acts of kindness, thrilling moments in books or movies, surprising news or announcements, or even personal experiences that bring about a sudden rush of emotions.