A Wiggers diagram is a regular illustration adapted in teaching physiology of cardiac studies.
The X-axis in the Wiggers diagram is used to plot time, while Y-axis depicts these factors on a single grid:
Blood pressure
Heart sounds
Ventricular volume
Arterial flow
Electrocardiogram
The Wiggers diagram demonstrates a coordinated variation of these values with heartbeat, thus helping one in an understanding of the complete cardiac cycle.