Remove extrinsic factors and/or pacemakers
Pacemakers do not reduce mortality, only decrease symptoms
Consider reversible causes e.g. treat hyperkalemia or hypokalemia
Atropine for bradycardia, progress to catecholamine or pacing
consider aminophylline, which inhibits suppressive effects of adenosine on the SA node in: 
Acute inferior MI with 2nd or 3rd degree AV block; 250mv IV bolus
Heart transplant: 6mg/kg in 100-200mL of IV fluid over 20-30 minutes
Spinal cord injury: 6mg/kg in 100-200mL of IV fluid over 20-30 minutes
Pacemakers do not reduce mortality, only decrease symptoms
Acute inferior MI with 2nd or 3rd degree AV block; 250mv IV bolus
Heart transplant: 6mg/kg in 100-200mL of IV fluid over 20-30 minutes
Spinal cord injury: 6mg/kg in 100-200mL of IV fluid over 20-30 minutes
Sick sinus syndrome
Regular
Hypertrophic cardiomyopathy
AV Node Independent
Brugada syndrome
Sinus tachycardia
Decompression sickness
Atrial tachycardia 