Irregular heartbeat may be a symptom of thyroid disorders, anemia, endocarditis, fluid electrolyte disorders, heart arrhythmia, heart valve disease, heatstroke, myocarditis, cardiomyopathy, hyperthyroidism, hereditary leptocytosis, calcium imbalance, rabies and carcinoid syndrome. To learn more about the cause of your symptoms, click on each of the diseases listed below.
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