What is what does it mean when someone?

says "my heart skipped a beat"

When someone says "my heart skipped a beat," they are usually describing a sudden physical sensation in their chest that feels like their heart is skipping a beat or fluttering irregularly. This can be a response to emotional excitement or a sudden shock or surprise. Medically, this sensation may be caused by premature ventricular contractions (PVCs) or extrasystoles, which are irregular heartbeats that usually pose no serious health risks. However, if someone experiences chest pain, dizziness, or shortness of breath along with this sensation, they should seek medical attention immediately, as it could indicate a more serious cardiac issue.