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Table 4 Patients with univentricular heart physiology: Mean values and agreement of 2D and 4D velocity acquisition measurements

From: Systemic-to-pulmonary collateral flow in patients with palliated univentricular heart physiology: measurement using cardiovascular magnetic resonance 4D velocity acquisition

  BCPC Fontan Univentricular heart physiology
  2D velocity acquisition 4D velocity acquisition 2D velocity acquisition 4D velocity acquisition Bland-Altman Pearson
difference Correlation
2D - 4D velocity acquisition 2D - 4D velocity acquisition
SVC 1.77±0.61 1.62±0.61 0.93±0.34 0.92±0.35 0.07 ± 0.04 0.96 *
IVC 1.79±1.01 1.74±1.05 1.80±0.63 1.64±0.55 0.11 ± 0.01 0.93 *
RPA 1.06±0.37 1.01±0.36 1.43±0.51 1.47±0.59 0.01 ± 0.05 0.91*
LPA 0.79±0.37 0.77±0.44 1.12±0.28 1.10±0.33 0.02 ± 0.05 0.94*
AO 3.61±1.21 3.57±1.16 3.08±0.70 3.04±0.56 0.04 ± 0.05 0.94*
SPCF 0.59±0.52 0.79±0.45 0.41±0.46 0.62±0.82 −0.02 ± 0.18 0.73*
Qp:Qs (0.43±0.23):1 (0.42±0.23):1 (0.82±0.29):1 (0.84±0.26):1 (0.02 ± 0.18):1 0.82*
  1. Values expressed as l/min/m2. *statistically significant correlation; 2D, two-dimensional; 4D, four-dimensional, AO, aorta; BCPC, bilateral cavopulmonary connection; CMR, cardiovascular magnetic resonance; IVC, inferior vena cava; LPA, left pulmonary artery; Qp, pulmonary blood flow; Qs, systemic blood flow; RPA, right pulmonary artery; SPCF, systemic-to-pulmonary collateral flow (SPCF = AO-SVC-IVC); SVC, superior vena cava.