mildus
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Do you know which are effects of parasympathetic stimulation on heart? There are 4 or 5 effects, but one of them is the most important. Do you know which one?
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| ssrpk
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i think it's P-R interval tht is quite significant clinically as well! remember digoxin mediated parasympathomimetic effect!
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| monterusca2004
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It is important also to say that A Ch increase permeability to potassium in the SA node, doing so, it decrease the automaticity of the node, decreasing the heart rate.
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| mildus
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 The main effect is on heart rate. Do you know why parasympathetic stimulation has only a small influence on heart contractility (inotropy)?
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| ssrpk
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first of all it's receptors are present on mainly AV-node and SA- node and atrial muscles...however ventricles are not directly influneced by PANS .
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| mildus
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That's it!
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