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Palpitations can be caused by stress, anxiety, caffeine, smoking, lack of sleep, and dehydration, or by conditions such as anemia, thyroid disorders, or electrolyte imbalances. They may also result from an abnormal heart rhythm. In a study of 100 adults published in 2023, coffee was not associated with a notable increase in premature atrial beats, but it raised the average number of premature ventricular beats from 102 to 154 per day and reduced sleep by about 36 minutes. Palpitations accompanied by chest pain, severe shortness of breath, intense dizziness, or fainting require urgent evaluation. Diagnosis includes an ECG and may require Holter monitoring or other tests. Treatment depends on the cause, ranging from lifestyle changes to treating an underlying health condition, medication, or catheter ablation. Do not take heart-rate-lowering medication without consulting a doctor.
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