Broad Differential Diagnosis:1) Hyperthyroidism 2) Electrolyte abnormality 3) Supraventricular tachycardia 4) Exercise induced bronchospasm 5) Cardiomyopathy 6) Anomalous coronary artery 7) Wolff-parkinson white syndrome 8) Symptomatic anemia 9) Pulmonary embolism 10) Recreational drug use 11) Pulmonary hypertension
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