Autonomic Innervation of Heart

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Last updated 7:17 AM on 8/25/26
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4 Terms

1
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How does sympathetic stimulation affect the heart?

  • Releases:

    • Epinephrine

    • Norepinephrine

  • ↑ Heart rate

  • ↑ Force of contraction


2
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What does positive chronotropic effect mean?

  • increased heart rate


3
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What does positive inotropic effect mean?

Increased force of cardiac contraction

4
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How does parasympathetic stimulation affect the heart?

  • Mediated primarily through vagus nerve

  • Releases acetylcholine

  • ↓ Heart rate

  • Primarily influences SA node