B. Umadevi^1,*, C. V. Vinay¹, P. A. Dinesh²

Molecular & Cellular Biomechanics, Vol.18, No.4, pp. 157-172, 2021, DOI:10.32604/mcb.2021.015605

Abstract A mathematical model has been developed to study the effect of particle drag parameter and frequency parameter on velocity and pressure gradient in nonlinear oscillatory two phase flow. The main purpose is to apply the model to study the combined effect of introduction of the catheter and elastic properties of the arterial wall on the pulsatile nature of the blood flow. We model the artery as an isotropic thin walled elastic tube and the catheter as a coaxial flexible tube. Blood is modeled as an incompressible particulate viscous Newtonian fluid. Perturbation technique has been applied to find the approximations for… More >

Jianming Wang, Xianyang Zhu^*, Xiaotang Sheng, Jingsong Geng, Jiawang Xiao, Qiguang Wang^*

Congenital Heart Disease, Vol.17, No.1, pp. 61-70, 2022, DOI:10.32604/CHD.2022.017225

Abstract Background: Left atrial appendage closure (LAAC) with simultaneous interventional occlusion therapy for congenital interatrial communication has become a new focus of patients with nonvalvular atrial fibrillation. Little is known about the results of mid-and long-term results. Objective: The aim of this study was to evaluate the midand long-term safety and effectiveness of simultaneous transcatheter closure of the left atrial appendage (LAA) and congenital interatrial communication closure in atrial fibrillation (AF) patients. Methods: From Jan 2016 to June 2017, 27 patients with AF were treated with simultaneous transcatheter closure of the LAA and atrial septal defect (ASD, n = 22), patent… More >

Maryam Altalhi¹, Sami Ur Rehman², Fakhre Alam², Ala Abdulsalam Alarood³, Amin ur Rehman², M. Irfan Uddin^4,*

Intelligent Automation & Soft Computing, Vol.31, No.2, pp. 961-969, 2022, DOI:10.32604/iasc.2022.020607

Abstract The proper computation of geometric parameters of the aorta and coronary arteries are very important for surgery planning, disease diagnoses, and age-related changes observation in the vessels. The accurate knowledge about the geometry of aorta and coronary arteries is required for the proper investigation of heart related diseases. The geometry of aorta and coronary arteries includes the diameter of the ascending and descending aorta and coronary arteries, length of the coronary arteries, branching angles of the coronary arteries and branching points. These geometric parameters from arteries can be computed from the 3D image data. In this paper, we propose an… More >

Wenqian Zhang^1,2,#, Chaojie Wang^1,3,#, Lingmei Zhou^2,4,#, Junjie Li², Jijun Shi², Yumei Xie², Mingyang Qian², Shushui Wang², Zhiwei Zhang^1,2,*

Congenital Heart Disease, Vol.16, No.5, pp. 519-528, 2021, DOI:10.32604/CHD.2021.015527

Abstract Objective: This study aims to evaluate the morphology and function of the aortic valve after transcatheter closure of ventricular septal defect (VSD) with aortic valve prolapse (AVP) abased on clinical and radiological outcomes. Methods: From January 2013 to November 2014, 164 consecutive patients (97 males, 59.1%) with VSD and AVP were treated by transcatheter closure. The patients were divided into the mild AVP group (n = 63), moderate AVP group (n = 89) and severe AVP group (n = 12). The clinical and radiological outcomes of these patients were analyzed retrospectively. Results: In total, 146 (89.0%) patients were successfully treated… More >

Adi Azriff Basri^1,6,*, Mohammad Zuber², Ernnie Illyani Basri¹, Muhammad Shukri Zakaria⁵, Ahmad Fazli Abd Aziz³, Masaaki Tamagawa⁴, Kamarul Arifin Ahmad^1,6

FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.3, pp. 531-553, 2021, DOI:10.32604/fdmp.2021.010925

Abstract Paravalvular Leakage (PVL) has been recognized as one of the most dangerous complications in relation to Transcathether Aortic Valve Implantation (TAVI) activities. However, data available in the literature about Fluid Structure Interaction (FSI) for this specific problem are relatively limited. In the present study, the fluid and structure responses of the hemodynamics along the patient aorta model and the aortic wall deformation are studied with the aid of numerical simulation taking into account PVL and 100% TAVI valve opening. In particular, the aorta without valve (AWoV) is assumed as the normal condition, whereas an aorta with TAVI 26 mm for… More >

Masataka Kitano^1,2,*, Kazuto Fujimoto¹, Atsuko Kato¹, Ken-ichi Kurosaki¹, Isao Shiraishi¹

Congenital Heart Disease, Vol.16, No.3, pp. 269-283, 2021, DOI:10.32604/CHD.2021.015308

Abstract Background: Although transcatheter closure of atrial septal defect (ASD) is safe and effective for patients with sufficient rim, ASD patients with absent and/or malaligned aortic and/or superior rim have higher risks of device embolization and cardiac erosion. We have treated such high-risk patients using a Figulla Flex II (FFII) device shaped flared and straddling behind the aorta because this method would avoid such serious complications. However, its long-term efficacy and safety remain unclear. Therefore, the midterm efficacy and safety of this method were studied. Methods: We retrospectively evaluated the outcome of 47 consecutive patients with such rim (age 6–73 years,… More >

Matthew I. Jones¹, Matthew Murphy², Eric Rosenthal¹, Kevin P. Walsh^2,3, Damien Kenny^2,3, Shakeel A. Qureshi¹, Gianfranco Butera^1,4,*

Congenital Heart Disease, Vol.16, No.3, pp. 197-203, 2021, DOI:10.32604/CHD.2021.015222

Abstract Objectives: We report our experience of using the 65 cm large diameter GORE^® DrySeal Flex Introducer sheath to facilitate transcatheter implantation of the Venus P-valve in the pulmonary position. Background: Transcatheter implantation of pulmonary valves can be difficult due to rigidity of the valve delivery system or the anatomy of the RVOT and pulmonary artery bifurcation and the risk of iatrogenic damage to the tricuspid valve support apparatus. Using long sheaths to pass and protect the tricuspid valve may facilitate the procedure. Methods: Multi-centre registry of patients who underwent transcatheter pulmonary valve implantation of the Venus P-valve using the GORE^®… More >

R. Allen Ligon^1,*, Larry A. Latson¹, Mark M. Ruzmetov², Kak-Chen Chan¹, Todd Roth¹, Immanuel I. Turner², Frank G. Scholl², Steve Bibevski²

Congenital Heart Disease, Vol.16, No.3, pp. 285-297, 2021, DOI:10.32604/CHD.2021.014373

Abstract Background: Pulmonary valve replacement (PVR) can be accomplished via surgical, transcatheter, or hybrid approaches. There are inherent advantages to transcatheter PVR and hybrid PVR without cardiopulmonary bypass. We review the methods and results of a standardized institutional approach to PVR. Methods: Retrospective review of all PVR cases between February 2017 and February 2020. Hybrid PVR entailed off-pump RVOT plication with percutaneous transcatheter PVR. Results: Primary transcatheter PVR was attempted in 37, hybrid PVR was performed in 11, and on-pump surgical PVR was performed in 9. Median age at PVR was 27 years (6–65). Primary transcatheter PVR was successful in 35/37… More >

Hongxiao Sun, Gang Luo, Zhanhui Du, Zhixian Ji, Silin Pan^*

Congenital Heart Disease, Vol.16, No.2, pp. 151-157, 2021, DOI:10.32604/CHD.2021.014770

Abstract Objective: To evaluate the efficacy of Amplatzer duct occluder II (ADO II) in the treatment of perimembranous ventricular septal defect (pmVSD) in children. Methods: Between June 2017 and June 2020, 13 patients with pmVSD had attempted transcatheter closure using ADO II, seven of patients were used antegrade approach and six of them were used retrograde approach. Results: There were 8 males and 5 females, age from 1 to 7 years, weight from 10.5 to 31.0 kg, and VSD size from 2.0 to 4.0 mm. Procedure was successful in all cases with the outer diameter of the occluders ranging from 4… More >

Diqi Zhu¹, Xiaohong Gu², Jie Shen^1,*, Fen Li^1,*

Congenital Heart Disease, Vol.16, No.2, pp. 147-150, 2021, DOI:10.32604/CHD.2021.014360

Abstract Background: Communication between the right pulmonary artery (RPA) and left atrium (LA) is a rare cause of central cyanosis in pediatric patients. Case presentation: We describe a 3-year-old female patient with an oxygen saturation of 70% at admission. The echocardiogram indicated an abnormal color flow Doppler in the LA and she underwent standard cardiac catheterization. The angiography of pulmonary artery revealed a 7.4 mm × 7.6 mm fistula between the RPA and LA and achieved successful closure using ventricular septal defect occlusion. Conclusion: The fistula between pulmonary artery and left atrium is an extremely rare but treatable congenital defect. It… More >