Erratum to: Continuous and Pulsatile Pediatric Ventricular Assist Device Hemodynamics with a Viscoelastic Blood Model (Cardiovascular Engineering and Technology, (2016), 7, 1, (23-43), 10.1007/S13239-015-0252-8)

In follow up research we recently discovered that several of the surplus hemodynamic energy (SHE) values used in our manuscript “Continuous and Pulsatile Pediatric Ventricular Assist Device Hemodynamics with a Viscoelastic Blood Model” were not correctly calculated. SHE (ergs/cm²) (Eq. 1) is the extra energy generated from a flow pulsation and is defined as the difference between the energy equivalent pressure (EEP, mmHg) (Eq. 2) and the time-averaged pressure (TAP, mmHg) (Eq. 3): SHE = 1332(EEP - TAP) (Formula Presented.) where Q is the flow rate (L/min), p is the boundary pressure (mmHg) and T is the length of the cardiac cycle (s). While the correct boundary pressures and TAPs were used in all simulations, the flow rate used in the calculation of EEP for the pulsatile (Case 2) and continuous (Case 3) flow cases at all three pediatric hematocrits (20, 40 and 60%), however, was incorrect and overestimated the true EEP and resultant SHE for these simulations. With respect to the healthy flow (Case 1), all TAP, EEP, and SHE values were calculated correctly.