Bradycardia is defined as pulse rate below 60 per minute.
This is commonly found in the following conditions
Causes of bradycardia
Commonest cause of bradycardia are regular athletic training
and myxoedema
Causes of physiological bradycardia
- Athletes
- Sleep
- Myxoedema
- Obstructive jaundice
- Raised intraocular pressure
- Raised intracranial tension(cushings phenomenon)
- Complete Heart blocks
- Sick sinus syndrome
- Drugs (beta blockers, verapamil,diltiazem, digoxin).
- Severe hypoxia
- Hypothermia
In sinus bradycardia the pulse rate is below 60 per minute
and the impulse is originating form the
SA node. The common causes are all the causes mentioned above in bradycardia
except complete heartblock (in CHB. idioventricular rhythm occurs at the rate
of 36 per minute)'
What are the causes of bradycardia associated with
convulsions ?
- Complete heart block (Stokcs-Adams syndrome).
- Increased intracranial tension due to meningoencephalitis. brain tumour,CVA
- Prior to development of coma in myxoedema.
