SINUS BRADYCARDIA


  • Normal in athletes
  • Can result from excessive "vagal tone"
    1. Vasovagal syncope
    2. Inferior MI
    3. Vagal maneuvers
    4. Parasympathomimetics, e.g. phenothiazines, Dig (mild)
  • Can result from decreased automaticity of sinus node
    1. Beta-blockers, verapamil, diltiazem
    2. Hypothyroidism
    3. Hypothermia
    4. Severe icterus