Alexander C. Egbe, Sindhura Ananthaneni, Raja Jadav, Srikanth Kothapalli, Charanjit S. Rihal, Muhammad Masood, Mounika Angirekula, Maria Najam, Numra Bajwa, Karim Tarek, Jessey Matthew, Heidi M. Connolly

Congenital Heart Disease, Vol.14, No.3, pp. 491-497, 2019, DOI:10.1111/chd.12782

Abstract Background: There are limited data about outcomes of coronary artery disease (CAD) in adults with repaired tetralogy of Fallot (TOF). The purpose of this study was to describe the prevalence and treatment of CAD in adults with TOF, and the impact of CAD on long‐term survival.
Methods: Retrospective review of MACHD database for adults with repaired TOF who underwent aortic root/selective coronary angiogram, 1990‐2017. Patients were categorized into three groups: (1) No CAD defined as normal coronary angiogram; (2) Mild CAD defined as ≤50% stenosis in all vessels; and, (3) Significant CAD defined as >50% stenosis in… More >

Caili Li^1,§, Christopher Baird², Jing Yao³, Chun Yang⁴, Liang Wang⁵, Han Yu⁵, Tal Geva⁶, Dalin Tang^5,*,7,§

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 59-59, 2019, DOI:10.32604/mcb.2019.06872

Abstract Pulmonary valve stenosis (PVS) is one common right ventricular outflow tract obstruction problem in patients with tetralogy of Fallot (TOF). Congenital bicuspid pulmonary valve (BPV) is a condition of valvular stenosis, and the occurrence of congenital BPV is often associated with TOF. Dynamic computational models of normal pulmonary root (PR) with tri-leaflet and PR with BPV in patients with TOF were developed to investigate the effect of geometric structure of BPV on valve stress and strain distributions. The pulmonary root geometry included valvular leaflets, sinuses, interleaflet triangles and annulus. Mechanical properties of pulmonary valve leaflet… More >

Han Yu¹, Tal Geva², Rahul H. Rathod², Alexander Tang², Chun Yang³, Zheyang Wu³, Kristen L. Billiar⁴, Xueying Huang⁵, Dalin Tang^1,*,3

Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 56-57, 2019, DOI:10.32604/mcb.2019.07257

Abstract Computational biomechanical models are widely used in cardiovascular research for better understanding of mechanisms governing disease development, quantitative diagnostic strategies and improved surgical designs with better outcome. Patients with repaired tetralogy of Fallot (TOF) account for the majority of cases with late onset right ventricle (RV) failure. The current surgical approach, which includes pulmonary valve replacement/insertion (PVR), has yielded mixed results. An innovative PVR surgical approach was proposed using active contracting bands to help ventricle to contract and improve RV function measured by ejection fraction [1]. Muscle active contraction caused by sarcomere shortening leads to… More >

Caili Li¹, Jing Yao², Chun Yang³, Di Xu², Liang Wang⁴, Dalin Tang^4,5,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 77-78, 2019, DOI:10.32604/mcb.2019.05745

Abstract Pulmonary valve stenosis (PVS) is one common post-operative problem in patients with tetralogy of Fallot (TOF) after repair. Congenital bicuspid pulmonary valve (BPV) is a condition of valvular stenosis, and the occurrence of congenital BPV is often associated with TOF. Compared with the biomechanical simulation model of the bicuspid aortic valve, the BPV is often neglected. In this study, we developed a dynamic biomechanical model of a simulated normal pulmonary root (PR) with tri-leaflet and a model of simulated PR with BPV in patients with repaired TOF in order to describe the effect of geometric… More >

Han Yu¹, Pedro J. del Nido², Tal Geva³, Chun Yang⁴, Zheyang Wu⁴, Rahul H. Rathod³, Xueying Huang⁵, Kristen L. Billiar⁶, Dalin Tang^1,4,*

Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 73-74, 2019, DOI:10.32604/mcb.2019.05837

Abstract Ventricle mechanical stress and strain calculations play an important role in cardiovascular investigations. Patients with repaired tetralogy of Fallot (TOF) account for the majority of cases with late onset right ventricular (RV) failure. The current surgical approach, including pulmonary valve replacement(PVR), has yielded mixed results with some patients recover RV function after pulmonary valve insertion with or without concomitant RV remodeling surgery but some do not[Therrien, Siu and McLaughlin (2000);]. Cardiac magnetic resonance (CMR) data were collected from 6 healthy volunteers and 12 Tetralogy of Fallot (TOF) patients before PVR with consent obtained. 12 patients… More >

Caili Li^{1, §}, Christopher Baird², Jing Yao³, Chun Yang⁴, Liang Wang⁵, Han Yu⁵, Tal Geva⁶, Dalin Tang^{5*, 7, §}

CMES-Computer Modeling in Engineering & Sciences, Vol.119, No.1, pp. 227-244, 2019, DOI:10.32604/cmes.2019.06036

Abstract Pulmonary valve stenosis (PVS) is one common right ventricular outflow tract obstruction problem in patients with tetralogy of Fallot (TOF). Congenital bicuspid pulmonary valve (BPV) is a condition of valvular stenosis, and the occurrence of congenital BPV is often associated with TOF. Dynamic computational models of normal pulmonary root (PR) with tri-leaflet and PR with BPV in patients with TOF were developed to investigate the effect of geometric structure of BPV on valve stress and strain distributions. The pulmonary root geometry included valvular leaflets, sinuses, interleaflet triangles and annulus. Mechanical properties of pulmonary valve leaflet… More >

Sara Salehyar^{1, †}, Nickolas Forsch^1,†,*, Kathleen Gilbert^2,3, Alistair A. Young^3,4, James C. Perry⁵, Sanjeet Hegde⁵, Jeffrey H. Omens^1,6, Andrew D. McCulloch^1,6

Molecular & Cellular Biomechanics, Vol.16, No.3, pp. 179-183, 2019, DOI:10.32604/mcb.2019.07384

Abstract Tetralogy of Fallot (TOF) is the most common form of cyanotic congenital heart disease. Infants diagnosed with TOF require surgical interventions to survive into adulthood. However, as a result of postoperative structural malformations and long-term ventricular remodeling, further interventions are often required later in life. To help identify those at risk of disease progression, serial cardiac magnetic resonance (CMR) imaging is used to monitor these patients. However, most of the detailed information on cardiac shape and biomechanics contained in these large four-dimensional (4D) data sets goes unused in clinical practice for lack of efficient and… More >

Shelby C. White¹, Jennifer Sedler², Trahern W. Jones³, Michael Seckeler¹

Congenital Heart Disease, Vol.13, No.6, pp. 1045-1049, 2018, DOI:10.1111/chd.12673

Abstract Objective: Applications of three‐dimensional (3D) printed models in medicine in‐ clude preprocedure planning, patient education, and clinical training. Reproducing complex anatomy as a 3D printed model can be useful for understanding congenital heart defects (CHD). We hypothesized that using 3D printed models during didactic sessions with resident physicians will improve trainees’ understanding of CHD.
Design and intervention: We performed a prospective, randomized educational in‐ tervention for teaching pediatric and pediatric/emergency medicine residents about simple (ventricular septal defect [VSD]) and moderately complex (tetralogy of Fallot [ToF]) CHD. Residents were divided into two groups: intervention and control. Each group… More >

Nikki M. Singh¹, Rohit S. Loomba², Todd M. Gudausky¹, Michael E. Mitchell³

Congenital Heart Disease, Vol.13, No.6, pp. 935-943, 2018, DOI:10.1111/chd.12670

Abstract Introduction: In patients with tetralogy of Fallot (TOF), use of transannular patch (TAP) may be required in order to relieve significant right ventricular outflow tract obstruction, subsequently resulting in pulmonary insufficiency (PI). The monocusp valve has been used to temporarily reduce insufficiency in hopes to improve short and midterm outcomes. The purpose of this study was to assess for potential benefits of the monocusp valve in this subset of patients.
Design: Between 2005 and 2016, 119 patients with TOF with pulmonary stenosis who underwent repair with TAP were analyzed, 43 (36.1%) had a monocusp valve placed. Immediate… More >

Keri M. Shafer^1,2, Alexander R. Opotowsky^1,2, Jonathan Rhodes¹

Congenital Heart Disease, Vol.13, No.6, pp. 903-910, 2018, DOI:10.1111/chd.12661

Abstract Objective: Risk prediction using cardiopulmonary exercise testing (CPET) in complex congenital heart disease tends to either focus on single diagnoses or complete cohorts. We aimed to evaluate patients with two distinct anatomies cared for at a single institution over the same time period to determine CPET variables associated with mortality.
Design: All Fontan and tetralogy of Fallot (TOF) subjects with CPET between November 1, 2002 and December 31, 2014 and subsequently died were identified (cases). Cases were matched 1:3 to controls with similar age, underlying anatomy and timing of exercise test.
Results: Of the 42 cases, 27 had… More >