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Friday, March 19, 2010

Wiggers Diagram =)

A Wiggers diagram is a standard diagram used in cardiac physiology.

The X axis is used to plot time, while the Y axis contains all of the following on a single grid:

By illustrating the coordinated variation of these values, it becomes easier to illustrate the relationship between these values in the cardiac cycle.

Note that during isovolumetric/isovolumic contraction and relaxation, all the heart valves are closed. At no time are all the heart valves open.

  • S3 and S4 heart sounds are associated with pathologies and are not routinely heard.

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