Palpitations are heartbeats of sudden onset, usually violent and painful. Normally the cardiac variations are only perceived in a situation of stress, strong emotion or after performing a major physical exercise. But heart palpitations can occur in certain pathological states in which the heart rate increases in intensity and frequency, as in the case of tachycardia, which may be a symptom of cardiac or non-cardiac disease, such as serious anaemia, increased thyroid function, liver disease, or other conditions. Palpitations may also appear after the ingestion of alcohol, tea, coffee and other stimulants.
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