1.Extrasystoles- Atrial, ventricular
2. Tachyarrhythmias- Atrial, ventricular
3. Endocrine -
Pheochromocytoma
Thyrotoxicosis
Hypoglycaemia
4. High output states- Anaemia, pyrexia,
Aortic regurgitation,
Patent ductus arteriosus
5. Drugs -Atropine, adrenaline,
aminophylline, thyroxine,
coffee, tea, alcohol
6. Psychogenic -Prolonged anxiety state
(Soldier’s heart, neurocirculatory asthenia,
Da Costa’s syndrome)
Referenca: Davidson