What is the maximum dose of epinephrine for a cardiac patient?

What is the maximum dose of epinephrine for a cardiac patient?

• A. 0.04 mg (2 carpules)
• B. 0.2 mg (11 carpules)
• C. 0.4 mg
• D. 1.0 mg

Answer: (A)

In patients with cardiac disease, epinephrine must be limited to avoid excessive stimulation of heart rate and blood pressure, which can raise myocardial oxygen demand and trigger angina or arrhythmias. A 1:100,000 epinephrine solution provides about 0.018 mg per cartridge; two cartridges give roughly 0.036 mg, commonly rounded to 0.04 mg. This is the maximum recommended dose per visit for a cardiac patient, balancing the benefits of vasoconstriction and anesthesia with the cardiovascular risk. Using more than this increases the risk of ischemia or arrhythmias. The other options represent doses well beyond what is considered safe for someone with significant heart disease.

In patients with cardiac disease, epinephrine must be limited to avoid excessive stimulation of heart rate and blood pressure, which can raise myocardial oxygen demand and trigger angina or arrhythmias. A 1:100,000 epinephrine solution provides about 0.018 mg per cartridge; two cartridges give roughly 0.036 mg, commonly rounded to 0.04 mg. This is the maximum recommended dose per visit for a cardiac patient, balancing the benefits of vasoconstriction and anesthesia with the cardiovascular risk. Using more than this increases the risk of ischemia or arrhythmias. The other options represent doses well beyond what is considered safe for someone with significant heart disease.