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The moderator band in the right ventricle is a band sorts of muscle which consists of a significant branch of the AV bundle. Does it mean it delivers impulses to the anterior papillary muscle faster? If it does, how does this help? and why only the anterior papillary muscle? What makes it special to have a moderator band?

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Does it mean it delivers impulses to the anterior papillary muscle faster?

Yes.

If it does, how does this help?

To facilitate the conduction time thereby allowing coordinated contraction of the anterior papillary muscle.

and why only the anterior papillary muscle?

This is because its chordae tendineae insert into anterior and posterior tricuspid valve leaflets, so only their contraction before systole would be optimum.

What makes it special to have a moderator band?

For effective Cardiac Output because it helps in coordinated contraction of ventricular cells. The ventricles must maximize systolic pressure to force blood through the circulation, so all the ventricular cells must work together.

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  • $\begingroup$ Could you add some reputable support/citations for your answer? Thanks! $\endgroup$ – theforestecologist Dec 1 '17 at 19:58

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