Heart palpitations are heartbeats that suddenly become more noticeable.
These are a feeling like your heart is "racing, pounding", or like you have missed heartbeats.
Palpitations are feelings that your heart is skipping a beat, fluttering, pounding, or beating too hard or too fast.
Many factors can trigger heart palpitations. Some common causes include physical or mental stress, anxiety, dehydration, and lack of sleep.