Figure 3From: Comparison of two different approaches in the detection of intermittent cardiorespiratory coordination during night sleepCoordination vs. HRV in subject b05. HRV parameters LF, HF and BAL vs. PR (upper diagrams) and PP (lower diagrams). The high correlation between PP and BAL confirms the methodological link between both parameters (see discussion) and supports the discussed dependency on sleep stages which has recently been shown for BAL.Back to article page