Prediction and perinatal management of severely restrictive atrial septum in fetuses with critical left heart obstruction: Clinical experience using pulmonary.

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Prediction and perinatal management of severely restrictive atrial septum in fetuses with critical left heart obstruction: Clinical experience using pulmonary venous Doppler analysis  Allison Divanović, MD, Kan Hor, MD, James Cnota, MD, Russel Hirsch, MD, Meredith Kinsel-Ziter, RDCS, Erik Michelfelder, MD  The Journal of Thoracic and Cardiovascular Surgery  Volume 141, Issue 4, Pages 988-994 (April 2011) DOI: 10.1016/j.jtcvs.2010.09.043 Copyright © 2011 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 Measurement of forward-flow VTI (combined S and D waves) and reverse-flow VTI (A wave). VTI, Time-velocity integral. The Journal of Thoracic and Cardiovascular Surgery 2011 141, 988-994DOI: (10.1016/j.jtcvs.2010.09.043) Copyright © 2011 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 Flowchart outlining the clinical accuracy of using a PVD FR VTI ratio less than 5. PVD, Pulmonary venous Doppler; FR, forward/reverse; VTI, time-velocity integral; RAS, restrictive atrial septum; C/S, cesarean section; EXIT, ex utero intrapartum treatment; ECMO, extracorporeal membrane oxygenation. The Journal of Thoracic and Cardiovascular Surgery 2011 141, 988-994DOI: (10.1016/j.jtcvs.2010.09.043) Copyright © 2011 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 Longitudinal changes in serial FR VTI data using the initial ratio and the last ratio obtained before delivery. Numbers indicate number of subjects in each range. Note only 2 subjects had FR VTI ratios that crossed (diagonal lines) over the thresholds of 5 or less and 3 or less. FR, Forward/reverse; VTI, time-velocity integral. The Journal of Thoracic and Cardiovascular Surgery 2011 141, 988-994DOI: (10.1016/j.jtcvs.2010.09.043) Copyright © 2011 The American Association for Thoracic Surgery Terms and Conditions

Figure 4 Pulmonary venous Doppler profiles in 3 fetuses with CLHO who required EAS in the newborn period. Note the variability in the FR VTI ratios. FR, Forward/reverse; VTI, time-velocity integral. The Journal of Thoracic and Cardiovascular Surgery 2011 141, 988-994DOI: (10.1016/j.jtcvs.2010.09.043) Copyright © 2011 The American Association for Thoracic Surgery Terms and Conditions

Figure 5 Proposed algorithm to assist clinicians in diagnosing RAS and determining the probability of postnatal EAS. RAS, Restrictive atrial septum; VTI, time-velocity integral; EAS, emergency atrial septostomy. The Journal of Thoracic and Cardiovascular Surgery 2011 141, 988-994DOI: (10.1016/j.jtcvs.2010.09.043) Copyright © 2011 The American Association for Thoracic Surgery Terms and Conditions