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A Wiggers diagram is a standard diagram used in cardiac physiology named after Dr. Carl J. Wiggers. The X axis is used to plot time, while the Y axis contains all of the following on a single grid: * Blood pressure * * Aortic pressure * * Ventricular pressure * * Atrial pressure * Ventricular volume * Electrocardiogram * Arterial flow (optional) * Heart sounds (optional) By illustrating the coordinated variation of these values, it becomes easier to illustrate the relationship between these values in the cardiac cycle. ==Events== 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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wiggers diagram」の詳細全文を読む スポンサード リンク
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