Fig. 10
From: Multimodal pathophysiological dataset of gradual cerebral ischemia in a cohort of juvenile pigs
Group level overview of the behavior of the ECG-derived multi-dimensional heart rate variability (HRV) measures. Principal component analysis (PCA) was used to separate the states of sedation, gradual ischemia and recovery and shows the best performing PCA over RQA (recurrence quantification analysis) measures of HRV. Note the general drop of HRV during ischemia and recovery during the period of post-ischemic recovery. The notched boxplots representation is helpful in visualizing the difference in the median; two medians are significantly different at the 5% level if their intervals (extremes of the notches) do not overlap39.
