A 45-year-old male presents with weakness, diaphoresis, hypotension (BP 80/60) and pulse 40. Which medication should be administered first?

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Multiple Choice

A 45-year-old male presents with weakness, diaphoresis, hypotension (BP 80/60) and pulse 40. Which medication should be administered first?

Symptomatic bradycardia requires a rapid approach to restore heart rate and perfusion. Atropine is the first-line drug because it blocks parasympathetic (vagal) influence on the heart, especially at the SA and AV nodes, leading to an increased heart rate and improved conduction. In this patient, with a pulse of 40 and hypotension, atropine can quickly raise the rate and help stabilize blood pressure. Give atropine as a 0.5 mg IV bolus, repeating every 3–5 minutes as needed up to a total of 3 mg, while monitoring ECG and vital signs. If there is no response or if the bradycardia is due to high-grade AV block or MI-related bradycardia, prepare for transcutaneous pacing or consider dopamine or epinephrine infusion as a backup. Dextrose addresses hypoglycemia, not bradycardia. A normal saline bolus may support blood pressure if there’s volume loss, but it won’t correct the slow heart rate as the primary issue. Epinephrine is used if atropine fails or in specific scenarios, not as the initial choice.

Symptomatic bradycardia requires a rapid approach to restore heart rate and perfusion. Atropine is the first-line drug because it blocks parasympathetic (vagal) influence on the heart, especially at the SA and AV nodes, leading to an increased heart rate and improved conduction. In this patient, with a pulse of 40 and hypotension, atropine can quickly raise the rate and help stabilize blood pressure.

Give atropine as a 0.5 mg IV bolus, repeating every 3–5 minutes as needed up to a total of 3 mg, while monitoring ECG and vital signs. If there is no response or if the bradycardia is due to high-grade AV block or MI-related bradycardia, prepare for transcutaneous pacing or consider dopamine or epinephrine infusion as a backup.

Dextrose addresses hypoglycemia, not bradycardia. A normal saline bolus may support blood pressure if there’s volume loss, but it won’t correct the slow heart rate as the primary issue. Epinephrine is used if atropine fails or in specific scenarios, not as the initial choice.

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