Fig. 4From: Increased cardiorespiratory synchronization evoked by a breath controller based on heartbeat detectionCorrelation analysis of the power spectral energy of HRV and breath rate. Scatterplots for RSA and respiratory rate during spontaneous breathing (Spt), the 2/2 breathing pattern (2/2), and the 4/4 breathing pattern (4/4) (a). Scatterplots for RSA and DBP during spontaneous breathing (Spt), the 2/2 breathing pattern (2/2), and the 4/4 breathing pattern (4/4) (b). Scatterplots for RSA and MBP during spontaneous breathing and the 2/2 and 4/4 breathing modes (c)Back to article page