Linear and Nonlinear Heart Rate Variability Indexes in Clinical Practice
Figure 2
Fast Fourier Transform Analysis. Black dots represent healthy patients and empty squares ICU cases. Dashed and continuous lines reflect LF/HF ratio after adjusting for other clinical comorbidities along with 95% confidential intervals (curved lines). -axis represents age in years. The two groups did not differ in term of LF/HF ratio ().
