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. Author manuscript; available in PMC: 2015 Nov 9.
Published in final edited form as: Heart Lung Circ. 2015 Feb 23;24(9):912–918. doi: 10.1016/j.hlc.2015.02.012

Figure 3.

Figure 3

Effect of plasma epinephrine content on systemic vascular resistance (SVR) (Panel A), heart rate (HR) (Panel B), max dP/dt (Panel C) and min dP/dt (Panel D). Data are fit to sigmoidal curves (Prism 5.0, Graph Pad). These correlations suggest that vascular effects occur at the lowest plasma epinephrine levels, HR increases at a significantly higher plasma level and contractile effects emerge at the highest plasma concentrations, such that the concentration where each effect half maximal (EC50) is: EC50 SVR < EC50 HR < EC50 max dP/dt and EC50 min dP/dt.