<unk>  is usually a response to physiological<unk> ress, such as exercise, or an increased sympathetic tone with increased catecholamine release, such as<unk> ress, fright, flight, and anger. Other causes include: * Pain * Fever * Anxiety * Dehydration * Malignant hyperthermia * Hypovolemia with hypotension and shock * Anemia * Hyperthyroidism * Mercury poisoning * Kawasaki disease * Pheochromocytoma * Sepsis * Pulmonary embolism * Acute coronary ischemia and myocardial infarction * Chronic obstructive pulmonary disease * Hypoxia * Intake of<unk> imulants such as caffeine, theophylline, nicotine, cocaine, or amphetamines * Hyperdynamic circulation * Electric shock * Drug withdrawal * Porphyria * Acute inflammatory demyelinating polyradiculoneuropathy * Postural orthostatic tachycardia syndrome * Mitral Valve Prolapse
Sinus tachycardia
Tachycardia
Sinus arrhythmia
Junctional tachycardia
Sinus bradycardia
Ventricular tachycardia
Inappropriate sinus tachycardia
Automatic tachycardia