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2 years ago in Cardiovascular Physiology & Therapeutics , Medical Pharmacology By Aarthi S
How does atropine influence heart rate and cardiovascular function?
In my research on autonomic nervous system modulators, I’ve encountered atropine frequently in protocols for bradycardia. I’m seeking a clear, mechanistic explanation of its action on the heart and vasculature to better understand its clinical applications and limitations in resuscitation scenarios.
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By Vineet Answered 8 months ago
In clinical practice, I’ve seen atropine used as a first-line agent for symptomatic bradycardia. It works by blocking muscarinic acetylcholine receptors in the heart, effectively removing the “braking” effect of the vagus nerve. This leads to a predictable increase in heart rate. However, I would recommend caution, as its effect on overall cardiovascular function is nuanced; it can sometimes trigger paradoxical bradycardia at very low doses and has minimal direct impact on vascular tone or contractility, which is why we often pair it with other agents in complex resuscitation.
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