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Table 5 Planar flow volumes as measured in the superior (SCV), inferior (ICV), and both caval veins (CV)

From: Age-related changes of right atrial morphology and inflow pattern assessed using 4D flow cardiovascular magnetic resonance: results of a population-based study

  Group 1 Group 2 Group 3 F(2,375) p-value
(20–39 years) (40–59 years) (60–80 years)
n = 43 n = 44 n = 39
Qantegrade, mL ± SD
 SVC 24.2 ± 6.4 24.5 ± 7.6 22.0 ± 6.8 1.6 0.210
 IVC 57.2 ± 21.0 51.3 ± 18.4 45.8 ± 1.6 3.8 0.025*
 CV 81.4 ± 23.3 75.9 ± 21.9 67.8 ± 17.8 4.2 0.017*
Qretrograde, mL ± SD
 SVC 0.5 ± 0.6 0.2 ± 0.3 0.2 ± 0.4 4.3 0.015*
 IVC 0.4 ± 0.6 0.1 ± 0.3 0.1 ± 0.3 4.2 0.017*
 CV 0.8 ± 1.1 0.4 ± 0.5 0.4 ± 0.5 5.9 0.004*
Qratio (SCV/ICV) 0.5 ± 0.2 0.5 ± 0.2 0.5 ± 0.3 0.9 0.427
SV, mL/cycle ± SD
 AAo 82.2 ± 20.9 73.4 ± 15.6 66.5 ± 13.9 8.7 < 0.001*
CO, L/min ± SD 5.3 ± 1.6 4.8 ± 0.9 4.4 ± 1.1 6.1 0.003*
Qmax systole
 SVC 74.2 ± 24.2 68.8 ± 20.7 59.9 ± 23.4 4.1 0.02*
 IVC 151.1 ± 55.3 119.8 ± 49.6 100.5 ± 40.7 3.7 0.02*
Qmax diastole
 SVC 36.4 ± 18.8 37.5 ± 12.3 31.5 ± 15.7 11.2 < 0.001*
 IVC 109.1 ± 45.9 90.0 ± 31.2 71.3 ± 30.8 10.8 < 0.001*
  1. Qantegrade flow rate (ml/min) in antegrade direction, Qretrograde flow rate (ml/min) in retrograde direction, Qratio ratio of total flow in SVC and IVC, SV stroke volume, CO cardiac output, Qmax systole maximum flow in systole, Qmax diastole maximum flow in diastole; *Significant