Wiggers diagram . The X axis is used to measure time, while the Y axis contains all the following in a single window to learn to differentiate how important the different studies of the heart are, what is measured on the Y axis appears below :
- Blood pressure
- Aortic pressure
- Ventricular pressure
- Atrial pressure
- Ventricular volume
- Electrocardiogram
- Arterial flow (optional)
- Heart sounds (optional)
By demonstrating the coordinated variation of these values, it becomes easier to observe the relationship between these values in the cardiac cycle .
Summary
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- 1 Etymology
- 2 Events
- 3 See also
- 4 External links
Etymology
The diagram is named after Dr. Carl J. Wiggers, MD. The diagram is often incorrectly called the “Wigger Diagram”
Events
| Phase | ECG | Heart sounds | Aortic valve | Mitral valve | |
| TO | Atrial systole | P | S4 * | Closed | Open |
| B | Ventricular systole – Isovolumic contraction | QRS | S1 (“lub”) | Closed | Closed |
| C1 | Ventricular systole – Ejection 1 | – | Open | Closed | |
| C2 | Ventricular systole – Ejection 2 | T | Open | Closed | |
| D | Ventricular diastole – Isovolumetric relaxation | – | S2 (“dub”) | Closed | Closed |
| E1 | Ventricular diastole – Ventricular filling 1 | – | S3 * | Closed | Open |
| E2 | Ventricular diastole – Ventricular filling 2 | – | Closed | Open |
Note that during isovolumic contraction and relaxation all heart valves are closed. At no time are all heart valves open.
- S3 and S4 heart sounds are associated with pathologies and are generally not heard.
