How do you describe a heart palpitation?

Various ways: Most people describe their heart as beating too fast, too hard, or irregular. Some say it feels like fluttering or skipping a beat. Palpitations are a symptom, and a doctor can usually find a diagnosis to explain your symptoms.

See below: Most people say they feel a "flip-flop" or a "flutter". Some say they feel their heart pound. Others feel a thud or a sensation as if their heart has momentarily stopped.