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Palpitations are often felt as rapid or irregular heartbeats and may not always indicate heart disease. If episodes are frequent or accompanied by dizziness or chest pain, further investigation is needed. Factors like stress, caffeine, or thyroid issues can trigger these sensations. An ECG may not always capture the cause, so Holter monitoring can be useful. Arrhythmias range from benign premature beats to serious conditions like atrial fibrillation. Symptoms vary widely, and treatment options depend on the diagnosis, including medication or catheter ablation.