In ACLS, what is a first-line treatment for symptomatic sinus bradycardia?

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Multiple Choice

In ACLS, what is a first-line treatment for symptomatic sinus bradycardia?

When the heart is beating too slowly and causing poor perfusion, the goal is to quickly counteract excessive vagal influence on the heart’s natural pacemakers. Atropine does this by blocking muscarinic receptors in the SA and AV nodes, removing the parasympathetic brake and allowing the nodes to fire faster and conduct impulses more readily. That rapid, targeted effect makes atropine the initial treatment in ACLS for symptomatic sinus bradycardia. Dosing is an IV bolus given early and can be repeated as needed up to a practical total, with the exact amount adjusted to the patient and protocol. If atropine doesn’t restore rate or the patient remains unstable, advance to pacing or vasopressor support and address reversible causes. Oxygen is helpful if there’s hypoxia, but it doesn’t treat the bradycardia itself.

When the heart is beating too slowly and causing poor perfusion, the goal is to quickly counteract excessive vagal influence on the heart’s natural pacemakers. Atropine does this by blocking muscarinic receptors in the SA and AV nodes, removing the parasympathetic brake and allowing the nodes to fire faster and conduct impulses more readily. That rapid, targeted effect makes atropine the initial treatment in ACLS for symptomatic sinus bradycardia. Dosing is an IV bolus given early and can be repeated as needed up to a practical total, with the exact amount adjusted to the patient and protocol. If atropine doesn’t restore rate or the patient remains unstable, advance to pacing or vasopressor support and address reversible causes. Oxygen is helpful if there’s hypoxia, but it doesn’t treat the bradycardia itself.

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