Skip to main content
. 2016 Nov 1;11(11):e0165904. doi: 10.1371/journal.pone.0165904

Fig 2. Respiratory peak on the frequency domain.

Fig 2

Typical power spectral density (PSD) of IBI records during a controlled breathing test for a control subject (left-hand panel), a recently diagnosed DM patient (middle panel) and a long-standing DM patient (right-hand panel). The dominant respiratory peak (RP) region is shaded black.