Ventricular kinetic energy may provide a novel noninvasive way to assess ventricular performance in patients with repaired tetralogy of Fallot Daniel.

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Ventricular kinetic energy may provide a novel noninvasive way to assess ventricular performance in patients with repaired tetralogy of Fallot Daniel Jeong, MD, MS, Petros V. Anagnostopoulos, MD, Alejandro Roldan-Alzate, PhD, Shardha Srinivasan, MD, Mark L. Schiebler, MD, Oliver Wieben, PhD, Christopher J. François, MD The Journal of Thoracic and Cardiovascular Surgery Volume 149, Issue 5, Pages 1339-1347 (May 2015) DOI: 10.1016/j.jtcvs.2014.11.085 Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 A and B, Healthy volunteer RV KE maps in a long-axis orientation. The KE values of each voxel of blood in the segmented plane where the highest KE values are marked in red. Note that highest KE values are seen along the RV outflow tract during systole and along the RV inner curvature during diastole. C and D, rTOF RV KE maps oriented along the RV outflow tract. Note that highest KE values are seen along the RV outflow tract during systole and diastole because of the presence of pulmonic regurgitation in this patient. KE, Kinetic energy. The Journal of Thoracic and Cardiovascular Surgery 2015 149, 1339-1347DOI: (10.1016/j.jtcvs.2014.11.085) Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 A, Peak systolic KERV and KELV comparison between subjects with rTOF and healthy volunteers. Differences in KERV (P = .65) and KELV (P = .47) are not statistically significant. B, Ratios of outflow to peak systolic ventricular KE as markers for ventricular-vascular efficiency. QMPA/KERV was significantly lower in rTOF than in healthy volunteers (P = .015). QAo/KELV was also significantly lower in rTOF than in healthy volunteers (P = .0003). KE, Kinetic energy; rTOF, repaired tetralogy of Fallot; LV, left ventricular; RV, right ventricular; Qmpa, main pulmonary artery flow; KERV, right ventricular kinetic energy; Qao, aortic flow; KELV, left ventricular kinetic energy. The Journal of Thoracic and Cardiovascular Surgery 2015 149, 1339-1347DOI: (10.1016/j.jtcvs.2014.11.085) Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 A, RVEDVI versus ventricular efficiency. B, RVEF versus ventricular efficiency. C, LVEDVI versus ventricular efficiency. D, LVEF versus ventricular efficiency. There is a moderately positive correlation between ventricular efficiency and RVEDVI in subjects with rTOF (r = 0.68, P = .03) demonstrated by the red boxes in A. However, the other comparisons did not reach statistical significance. RVEDVI, Right ventricular end-diastolic volume index; Qmpa, main pulmonary artery flow; KERV, right ventricular kinetic energy; rTOF, repaired tetralogy of Fallot; RVEF, right ventricular ejection fraction; LVEDVI, left ventricular end-diastolic volume index; Qao, aortic flow; KELV, left ventricular kinetic energy; LVEF, left ventricular ejection fraction. The Journal of Thoracic and Cardiovascular Surgery 2015 149, 1339-1347DOI: (10.1016/j.jtcvs.2014.11.085) Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

RV kinetic energy is a potentially new marker for impaired RV function in rTOF. The Journal of Thoracic and Cardiovascular Surgery 2015 149, 1339-1347DOI: (10.1016/j.jtcvs.2014.11.085) Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions