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Premature beats are extra heartbeats that occur earlier than expected. They are usually felt as a thumping or fluttering sensation in the chest and can be caused by stress, caffeine, alcohol, or certain medications. They are usually harmless and do not require treatment, but if they become frequent or bothersome, a doctor should be consulted.
All of the following must be considered when interpreting clinical findings and are too extensive to be covered on this site: