Magnetic resonance phase-shift velocity mapping in pediatric patients with pulmonary venous obstruction
Neill Videlefsky, MD*,
W. James Parks, MD ,
John Oshinski, PhD ,
Katharine L. Hopkins, MD ,
Kevin M. Sullivan, PhD, MPH, MHA,
Roderic I. Pettigrew, PhD, MD and
Derek Fyfe, MD, PhD
* Pediatric Cardiology Association, Atlanta, Georgia, USA
Sibley Heart Center Cardiology, Atlanta, Georgia, USA
Emory University School of Medicine, Atlanta, Georgia, USA
Children’s Health Care of Atlanta at Egleston Children’s Hospital, Atlanta, Georgia, USA
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Figure 1 Sequential left parasagital fast field echocardiographic real (FFER) magnitude images in a pt post-TAPVR repair. (A)Left upper and lower pulmonary veins (solid arrow) entering the left atrium. (B–D) The progression of images from (B) to (D) show increasing turbulence in the left atrium (arrow), indicating acceleration of blood flow due to the stenosis.
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Figure 2 Phase-shift mapping image of stenosed left pulmonary veins with overlay of velocity curve. Velocity phase mapping again shows flow acceleration (increasing darkness of flow signal) arising from the left upper and lower pulmonary veins (solid arrows). The velocity cursor (labeled 1) is located at the maximal velocity point. Graphic display of velocity is shown in cm/s.
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Figure 3 Comparison of MR peak pulmonary vein velocities for all patients (control group n = 26, study group n = 7; p = 0.002). Solid bars = control group; stippled bars = study group.
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