ABSTRACT
Tachycardia:
1 Physiologic (exercise; anxiety).
2 Anaemia.
3 Fever.
4 Thyroid problem (thyrotoxicosis).
5 Heart problem (tachyarrhythmias, e.g. SVT; IHD/MI; heart failure; hypotension/hypovolaemia; drugs like adrenaline, atropine, salbutamol, caffeine, alcohol, amphetamines).
6 Lung problem (hypoxia d/t any cause, e.g. pulmonary embolism).
