Sedation Options for Bradycardia

First-Line Management of Bradycardia

The American Heart Association recommends atropine 0.5 to 1 mg IV every 3-5 minutes (maximum total dose 3 mg) as the first-line treatment for symptomatic bradycardia 1, 2, 3
If atropine fails, consider epinephrine (2-10 μg/min) or dopamine (2-10 μg/kg/min) infusion, as recommended by the American College of Cardiology 3, 4
Transcutaneous pacing may be considered when full-dose atropine fails, although it may not be more effective than second-line drug therapy, according to the American Heart Association 2, 5

The American College of Cardiology recommends avoiding benzodiazepines and opioids if possible, as they can worsen bradycardia through their sympatholytic effects 6
For bradycardia after heart transplant, atropine should be used with caution as it may paradoxically cause high-degree AV block, as noted by the American Heart Association 3, 4
For bradycardia after inferior myocardial infarction, cardiac transplant, or spinal cord injury, consider theophylline 100-200 mg slow IV injection (maximum 250 mg), as recommended by the American College of Cardiology 3, 6, 7

First stabilize the bradycardia with appropriate medications (atropine, epinephrine, or dopamine), as recommended by the American Heart Association 2, 3
If sedation is absolutely necessary, ensure continuous cardiac monitoring and have resuscitation equipment readily available, according to the American College of Cardiology 2, 3
Use the lowest effective dose of sedative medication and choose agents with minimal cardiac depressant effects, as recommended by the American Heart Association 1, 2

Doses of atropine <0.5 mg may paradoxically result in further slowing of heart rate, as noted by the American Heart Association 2
Use atropine cautiously in the presence of acute coronary ischemia or MI as increased heart rate may worsen ischemia, according to the American College of Cardiology 2
Atropine will likely be ineffective in patients who have undergone cardiac transplantation, as reported by the American Heart Association 2, 6