Tracking Changes in Cardiac Output: Statistical Considerations on the 4-Quadrant Plot and the Polar Plot Methodology.

@article{Saugel2015TrackingCI,
  title={Tracking Changes in Cardiac Output: Statistical Considerations on the 4-Quadrant Plot and the Polar Plot Methodology.},
  author={Bernd Saugel and Oliver Grothe and Julia Y. Wagner},
  journal={Anesthesia and analgesia},
  year={2015},
  volume={121 2},
  pages={514-24}
}
When comparing 2 technologies for measuring hemodynamic parameters with regard to their ability to track changes, 2 graphical tools are omnipresent in the literature: the 4-quadrant plot and the polar plot recently proposed by Critchley et al. The polar plot is thought to be the more advanced statistical tool, but care should be taken when it comes to its interpretation. The polar plot excludes possibly important measurements from the data. The polar plot transforms the data nonlinearily, which… CONTINUE READING

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