Kinetics of Cardiac Output at the Onset of Exercise in Precapillary Pulmonary Hypertension

Table 3

Parameters describing the heart rate (HR), stroke volume (SV), and cardiac output (CO) kinetics upon exercise onset for PH patients () and control subjects (). , baseline mean value as determined by model 1; min, minimal value detected by models 2 and 3; , amplitude of the parameter increase; , time constant; , time delay of the exponential; , time of minimal value determined for models 2 and 3; MRT, mean response time; ss, steady-state exercise mean value as determined by the model. Analysis with model 2 was possible only for 8 control subjects.

		PH ()
		or min		(s)	or (s)	MRT (s)	ss
HR (min^−1)	Model 1
	Model 2
	Model 3
SV (ml)	Model 1
	Model 2
	Model 3
CO (l⋅min^−1)	Model 1
	Model 2
	Model 3
		Controls ()
		or min		(s)	or (s)	MRT (s)	ss
HR (min^−1)	Model 1
	Model 2
	Model 3
SV (ml)	Model 1
	Model 2
	Model 3
CO (l⋅min^−1)	Model 1
	Model 2
	Model 3