Cause
Sinus tachycardia is usually a response to normal physiological situations, such as exercise and an increased sympathetic tone with increased catecholamine release—stress, fright, flight, anger. Other causes include:
- Pain
- Fever
- Anxiety
- Dehydration
- Malignant hyperthermia
- Hypovolemia with hypotension and shock
- Anemia
- Heart failure
- Hyperthyroidism
- Mercury poisoning
- Kawasaki disease
- Pheochromocytoma
- Sepsis
- Pulmonary embolism
- Acute coronary ischemia and myocardial infarction
- Chronic pulmonary disease
- Hypoxia
- Intake of stimulants such as caffeine, nicotine, cocaine, or amphetamines
- Hyperdynamic circulation
- Electric shock
- Drug withdrawal
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