title: Status of systemic to pulmonary arterial collateral flow after the fontan procedure.
abstract: The investigators recently validated a method of quantifying systemic-to-pulmonary arterial collateral flow using phase-contrast magnetic resonance imaging velocity mapping. Cross-sectional data suggest decreased collateral flow in patients with total cavopulmonary connections (TCPCs) compared with those with superior cavopulmonary connections (SCPCs). However, no studies have examined serial changes in collateral flow from SCPCs to TCPCs in the same patients. The aim of this study was to examine differences in collateral flow between patients with SCPCs and those with TCPCs. Collateral flow was quantified by 2 independent measures from 250 single-ventricle studies in 219 different patients (115 SCPC and 135 TCPC studies, 31 patients with both) and 18 controls, during routine studies using through-plane phase-contrast magnetic resonance imaging. Collateral flow was indexed to body surface area, aortic flow, and pulmonary venous flow. Regardless of indexing method, SCPC patients had significantly higher collateral flow than TCPC patients (1.64 ± 0.8 vs 1.03 ± 0.8 L/min/m(2), p <0.001). In 31 patients who underwent serial examinations, collateral flow as a fraction of aortic flow increased early after TCPC completion. In TCPC patients, indexed collateral flow demonstrated a significant negative correlation with time from TCPC. In conclusion, SCPC and TCPC patients demonstrate substantial collateral flow, with SCPC patients having higher collateral flow than TCPC patients overall. On the basis of the paired subset analysis, collateral flow does not decrease in the short term after TCPC completion and trends toward an increase. In the long term, however, collateral flow decreases over time after TCPC completion.
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania. Electronic address: whiteheadk@email.chop.edu.
authors.forename: Kevin K
authors.initials: KK
authors.lastname: Whitehead
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Harris
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Glatz
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Gillespie
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Michael V
authors.initials: MV
authors.lastname: DiMaria
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Neil E
authors.initials: NE
authors.lastname: Harrison
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Yoav
authors.initials: Y
authors.lastname: Dori
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Marc S
authors.initials: MS
authors.lastname: Keller
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Rome
authors.affiliation: Division of Cardiology and Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Fogel
mesh_terms: D001783:Blood Flow Velocity; D002648:Child; D002675:Child, Preschool; D003097:Collateral Circulation; D005260:Female; D018729:Fontan Procedure; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D011446:Prospective Studies; D011651:Pulmonary Artery / Q000601:surgery*; D011652:Pulmonary Circulation; D016896:Treatment Outcome