A patient with symptomatic bradycardia and hypotension requires which medication as first-line therapy?

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Multiple Choice

A patient with symptomatic bradycardia and hypotension requires which medication as first-line therapy?

In symptomatic bradycardia with hypotension, the goal is to rapidly increase heart rate by reducing the heart’s parasympathetic (vagal) influence. Atropine does exactly that: it blocks muscarinic receptors, which decreases vagal tone on the SA node and AV node, allowing the heart to fire faster and improving conduction. This often improves perfusion quickly, making it the preferred initial treatment. Mechanically, atropine is given IV and typically 0.5 mg bolus, repeated every 3–5 minutes as needed up to a total of 3 mg. If the patient doesn’t respond or if a high-grade AV block is present, other measures such as dopamine or epinephrine infusions may be used to support heart rate and blood pressure, and pacing may be required. Adenosine is not appropriate here, as it slows AV conduction and is used for certain tachyarrhythmias, not bradycardia.

In symptomatic bradycardia with hypotension, the goal is to rapidly increase heart rate by reducing the heart’s parasympathetic (vagal) influence. Atropine does exactly that: it blocks muscarinic receptors, which decreases vagal tone on the SA node and AV node, allowing the heart to fire faster and improving conduction. This often improves perfusion quickly, making it the preferred initial treatment.

Mechanically, atropine is given IV and typically 0.5 mg bolus, repeated every 3–5 minutes as needed up to a total of 3 mg. If the patient doesn’t respond or if a high-grade AV block is present, other measures such as dopamine or epinephrine infusions may be used to support heart rate and blood pressure, and pacing may be required. Adenosine is not appropriate here, as it slows AV conduction and is used for certain tachyarrhythmias, not bradycardia.

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