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Table 1 Quantitative parameters of viscous energy loss and Kinetic energy during diastole in AVSD-repaired patients compared to controls

From: Elevated energy loss in diastolic left ventricular inflow corresponds to an increase in kinetic energy in patients with a repaired atrioventricular septal defect: Quantification from 4D Flow MRI

 

Control (N=23)

AVSD-repaired patients (N=23)

Age (yrs)

19 ± 8

20 ± 8

Heart rate (bpm)

87 ± 11

94 ± 15

EL (mJ/mL)

0.21 ± 0.07

0.29 ± 0.12a

KE (mJ/mL)

0.16 ± 0.07

0.24± 0.11b

(EL/KEavg) *

1.31 ± 0.43

1.22 ± 0.5c

  1. a p<0.05 , b p<0.01 and c p=0.3 * the dimensionless ratio (EL/KEavg) represents the ratio of the amount of kinetic energy lost through viscosity (EL) to the amount of kinetic energy(KE) which is still available (retained) during diastole e.g. (EL/KEavg)=1.3 means that the amount of lost kinetic energy due to viscosity is 1.3 times the amount of kinetic energy which is still retained from diastole. KEavg represents the average KE available over diastole