Assessment of Intracardiac Blood Flow in Patients with Functional Single Ventricle after Fontan Surgery and Children Volunteers

2018 ◽  
Author(s):  
Liwei Hu ◽  
Rongzhen Ouyang ◽  
Yafeng Peng ◽  
Qian Wang ◽  
Aimin Sun ◽  
...  
Keyword(s):  
Blood Flow ◽  
Single Ventricle ◽  
Fontan Surgery ◽  
Intracardiac Blood Flow

Numerical Modeling of Pulsating Inflow to the Pulmonary Arteries in TCPC Morphology Using FSI Approach

2013 ◽  
Author(s):  
Hamid Reza Rajabzadeh ◽  
Bahar Firoozabadi ◽  
Mohammad Said Saidi ◽  
Salman Sohrabi ◽  
Seyyed Mahdi Nemati Mehr
Keyword(s):  
Blood Flow ◽  
Single Ventricle ◽  
Pulmonary Stenosis ◽  
Fontan Operation ◽  
Pulmonary Arteries ◽  
Rigid Wall ◽  
New Approach ◽  
Pulmonary Flow ◽  
Single Ventricle Heart Defect ◽  
Fontan Surgery

The Fontan surgery is performed on patients with a single ventricle heart defect to prevent the combination of highly-oxygenated and poorly-oxygenated blood. Blood flow in total cavopulmonary connection (TCPC) which culminates an ordinary Fontan operation is practically steady-state but this flow is not appropriate for respiratory systems. This article investigates an approach in Fontan surgery that has been recently proposed in order to make the pulmonary blood flow pulsating. Moreover, for investigating the compliance of vessels and its effects on blood flow in TCPC, we have used the FSI (Fluid Structure Interaction) method as well as rigid wall assumption for comparison purposes. Our TCPC model structure has obtained from CT Angiography (CTA) scan of a single ventricle patient who has undergone a normal Fontan surgery. In this new procedure, pulmonary stenosis (PS), containing high pressure and pulsating flow, has been added to the original geometry for pulsating the main flow and then its effect on the general flow in left and right pulmonary arteries has been studied by increasing the inlet velocity to PS. In overall, our results show that this new approach increases the pulsations of pulmonary flow.

scholarly journals PEMODELAN MATEMATIKA ALIRAN DARAH PADA PEMBULUH DARAH ARTERI DAN VENA PADA KELAINAN JANTUNG SINGLE VENTRICLE

KadikmA ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 1
Author(s):  
Mutia Aris Pradina
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Viscosity ◽  
Single Ventricle ◽  
Velocity Change ◽  
Heart Defect ◽  
Fluent Software ◽  
Single Ventricle Heart Defect ◽  
Fontan Surgery ◽  
Arteries And Veins

Single ventricle is a heart defect in which one of the ventricle does not developed and bother the  blood flow. One of the solutions is fontan surgery.  The result of Fontan surgery allows the blood flowing in veins that initially lead to the heart change into the arteries. Because of these changes, there are possibility of swelling and velocity change of blood flowing. This research constructed a mathematical model of blood flowing velocity in arteries and veins due to a single ventricle heart defect that was formed from the momentum and mass equation, which was influenced by the diameter of venous vessel and blood viscosity. The analysis of the blood flow velocity in arteries and veins due to single ventricle heart defect was simulated by MATLAB and FLUENT software. The factors observed were the effect of venous diameter and blood viscosity on the velocity of blood flow in the veins. The result indicated that the greater diameter of the vein, the smaller the flow velocity in the vein. The greater blood viscosity resulted the smaller flow velocity in arteries and veins.

Single-centre experience in stenting arterial shunts for adult CHD patients with single-ventricle physiology and pulmonary blood flow dependent on arterial shunts

2018 ◽  
Vol 28 (12) ◽  
pp. 1431-1435
Author(s):  
Mohamed Kasem ◽  
James Bentham ◽  
John Thomson
Keyword(s):  
Blood Flow ◽  
Pulmonary Blood Flow ◽  
Single Ventricle ◽  
Well Being ◽  
Adult Patients ◽  
P Value ◽  
Intermediate Step ◽  
Medium Term ◽  
Single Ventricle Physiology ◽  
Post Procedure

AbstractObjectivesThe objectives of this study were to describe the approach to stenting arterial shunts in adult congenital patients with single-ventricle physiology and to assess the medium-term clinical and haemodynamic outcomes following stent insertion.BackgroundAdult patients with single-ventricle physiology and pulmonary blood flow dependent on a surgically placed arterial shunt who did not progress to venous palliation are extremely challenging to manage. Progressive cyanosis secondary to narrowing of the shunt has a marked impact on exercise tolerance and results in intolerable well-being for these patients. Stenting arterial shunts in adult patients is one method that can help improve pulmonary blood flow. There is very limited information in the literature about this patient.MethodsThis is a retrospective study for arterial shunts stenting conducted between 2008 and 2016. The peripheral oxygen saturations, the NYHA status, the haemoglobin, and the degree of atrio-ventricular valve regurgitation as assessed on transthoracic echo were compared before and 6–12 months after procedures.ResultsThere was a short-term improvement in oxygen saturations; the pre-procedure mean was 75.8 (SD 2.55)% (range 70–85%) and post-procedure mean was 83 (SD 2.52)% (range 78–87%), with a p value of 0.04. Haemoglobin level decreased from a pre-procedure mean of 22.06–20.28 g/L 6 months post procedure (range 18.1–24.4 to 13–23.3 g/L), with a p value of 0.44. NYHA class decreased from a mean of 3.2–2.2 post procedure. Left atrial volume for four of the cases did not change (22.6–76.6 ml [mean 48.4 ml] to 29.6–72.9 ml [mean 52 ml], p value: 0.83).ConclusionsStenting stenotic arterial shunts is a useful method to gain a medium-term improvement on the oxygen saturation and clinical symptoms, and may act as a useful intermediate step for further management plans.

Effect of Accessory Pulmonary Blood Flow on Survival After the Bidirectional Glenn Procedure

Circulation ◽  
1999 ◽  
Vol 100 (suppl_2) ◽  
Author(s):  
Richard D. Mainwaring ◽  
John J. Lamberti ◽  
Karen Uzark ◽  
Robert L. Spicer ◽  
Mark W. Cocalis ◽  
...  
Keyword(s):  
Blood Flow ◽  
Mortality Rate ◽  
Pulmonary Blood Flow ◽  
Single Ventricle ◽  
Fontan Operation ◽  
Right Ventricular Outflow Tract ◽  
Bidirectional Glenn ◽  
Actuarial Analysis ◽  
Bidirectional Glenn Procedure ◽  
Glenn Procedure

Background —The bidirectional Glenn procedure (BDG) is used in the staged surgical management of patients with a functional single ventricle. Controversy exists regarding whether accessory pulmonary blood flow (APBF) should be left at the time of BDG to augment systemic saturation or be eliminated to reduce volume load of the ventricle. The present study was a retrospective review of patients undergoing BDG that was conducted to assess the influence of APBF on survival rates. Methods and Results —From 1986 through 1998, 149 patients have undergone BDG at our institution. Ninety-three patients had elimination of all sources of APBF, whereas 56 patients had either a shunt or a patent right ventricular outflow tract intentionally left in place to augment the pulmonary blood flow provided by the BDG. The operative mortality rate was 2.2% without APBF and 5.4% with APBF. The late mortality rate was 4.4% without APBF and 15.1% with APBF. Actuarial analysis demonstrates a divergence of the Kaplan-Meier curves in favor of patients in whom APBF was eliminated ( P <0.02). One hundred seven patients have subsequently undergone completion of their Fontan operation, so the actuarial analysis includes the operative risk of this second operation. Conclusions —The results suggest that the elimination of APBF at the time of BDG may confer a long-term advantage for patients with a functional single ventricle.

Superior Cavopulmonary Connection: Its Physiology, Limitations, and Anesthetic Implications

2020 ◽  
Vol 24 (4) ◽  
pp. 337-348
Author(s):  
Ray S. Choi ◽  
James A. DiNardo ◽  
Morgan L. Brown
Keyword(s):  
Blood Flow ◽  
Pulmonary Blood Flow ◽  
Single Ventricle ◽  
Fontan Procedure ◽  
Intermediate Stage ◽  
Ventricular Volume ◽  
Volume Load ◽  
Modes Of Failure ◽  
Anesthetic Considerations ◽  
Cavopulmonary Connection

The superior cavopulmonary connection (SCPC) or “bidirectional Glenn” is an integral, intermediate stage in palliation of single ventricle patients to the Fontan procedure. The procedure, normally performed at 3 to 6 months of life, increases effective pulmonary blood flow and reduces the ventricular volume load in patients with single ventricle (parallel circulation) physiology. While the SCPC, with or without additional sources of pulmonary blood flow, cannot be considered a long-term palliation strategy, there are a subset of patients who require SCPC palliation for a longer interval than the typical patient. In this article, we will review the physiology of SCPC, the consequences of prolonged SCPC palliation, and modes of failure. We will also discuss strategies to augment pulmonary blood flow in the presence of an SCPC. The anesthetic considerations in SCPC patients will also be discussed, as these patients may present for noncardiac surgery from infancy to adulthood.

Endovascular stents for relief of cyanosis in single-ventricle patients with shunt or conduit-dependent pulmonary blood flow

2006 ◽  
Vol 68 (2) ◽  
pp. 280-286 ◽  
Author(s):  
Christopher J. Petit ◽  
Matthew J. Gillespie ◽  
Jacqueline Kreutzer ◽  
Jonathan J. Rome
Keyword(s):  
Blood Flow ◽  
Pulmonary Blood Flow ◽  
Single Ventricle ◽  
Endovascular Stents
Sign in / Sign up

Export Citation Format

Share Document