What type of effect does atropine have on the heart?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Prepare for the Paramedic Exam with our paramedic exam quiz. Engage with flashcards and multiple choice questions, complete with hints and explanations. Get ready to excel in your paramedic exam!

Multiple Choice

What type of effect does atropine have on the heart?

Explanation:
Atropine increases heart rate by blocking parasympathetic (vagal) input to the heart. It antagonizes muscarinic receptors (mainly M2) on the SA node, so the acetylcholine-mediated slowing is removed. The SA node fires more quickly, giving a positive chronotropic effect (increased rate). It doesn’t primarily boost contraction strength (inotropy) or dictate conduction speed (dromotropy), though blocking vagal influence can modestly affect AV conduction at higher doses.

Atropine increases heart rate by blocking parasympathetic (vagal) input to the heart. It antagonizes muscarinic receptors (mainly M2) on the SA node, so the acetylcholine-mediated slowing is removed. The SA node fires more quickly, giving a positive chronotropic effect (increased rate). It doesn’t primarily boost contraction strength (inotropy) or dictate conduction speed (dromotropy), though blocking vagal influence can modestly affect AV conduction at higher doses.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy