Sinus bradycardia: aetiology

"SINUS BRADICARDIA"

S-Sleep
I-Infections (myocarditis)
N-Neap thyroid (hypothyroid)
U-Unconsciousness (vasovagal syncope)
S-Subnormal temperatures (hypothermia)
B-Biliary obstruction
R-Raised CO2 (hypercapnia)
A-Acidosis
D-Deficient blood sugar (hypoglycemia)
I-Imbalance of electrolytes
C-Cushing's reflex (raised ICP)
A-Aging
R-Rx (drugs, such as high-dose atropine)
D-Deep anaesthesia
I-Ischemic heart disease
A-Athletes