File:Wiggers Diagram.png

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Wiggers_Diagram.png (651 × 470 pixels, file size: 36 KB, MIME type: image/png)

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Description
English: A Wiggers diagram, showing the cardiac cycle events occuring in the left ventricle.

In the atrial pressure plot: wave "a" corresponds to atrial contraction, wave "c" corresponds to an increase in pressure from the closed mitral valve bulging into the atrium during ventricular systole, and wave "v" corresponds to passive atrial filling.

In the electrocardiogram: wave "P" corresponds to the onset of atrial depolarization, waves "QRS" (aka QRS complex) correspond to the onset of ventricular depolarization, and wave "T" corresponds to ventricular repolarization.

In the phonocardiogram: The sound labeled 1st contributes to the S1 heart sound and is the reverberation of blood from the sudden closure of the mitral valve (left A-V valve) and the sound labeled "2nd" contributes to the S2 heart sound and is the reverberation of blood from the sudden closure of the aortic valve.
Date
Source Wikimedia Commons, File:Cardiac Cycle Left Ventricle.PNG. Source file has a serious mistake which was corrected in the new image.
Author DanielChangMD revised original work of DestinyQx
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File:Wiggers Diagram.svg is a vector version of this file. It should be used in place of this PNG file when not inferior.
File:Wiggers Diagram.png → File:Wiggers Diagram.svg
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New SVG image

This a revision on the work by DestinyQx whose original image can be found here: http://commons.wikimedia.org/wiki/File:Cardiac_Cycle_Left_Ventricle.PNG

The original image incorrectly portrays aortic valve closure which occurs when left ventricular pressure falls below aortic pressure. This has been corrected in this revision. Some spelling has also been corrected. The credit for the original drawing goes to DestinyQx.

The additions to the description have been added by myself.

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File history

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Date/TimeThumbnailDimensionsUserComment
current04:38, 11 December 2011Thumbnail for version as of 04:38, 11 December 2011651 × 470 (36 KB)DanielChangMD (talk | contribs)Fixed aortic pressure curve to more accurately portray the relationship between aortic and ventricular pressure with regard to rapid and slow ejection phases.
06:22, 8 December 2011Thumbnail for version as of 06:22, 8 December 2011651 × 470 (36 KB)DanielChangMD (talk | contribs)Fixed spelling error for aortic valve.
03:52, 8 December 2011Thumbnail for version as of 03:52, 8 December 2011651 × 470 (36 KB)DanielChangMD (talk | contribs)

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