Figure 1

EKG lead II waveform recording over one respiratory cycle. RDIImin and RDIImax were defined as minimum and maximum R wave amplitudes of one implied respiratory cycle. These variables were then used to calculate a single EKGv.
EKG lead II waveform recording over one respiratory cycle. RDIImin and RDIImax were defined as minimum and maximum R wave amplitudes of one implied respiratory cycle. These variables were then used to calculate a single EKGv.