scholarly journals Extra-anatomic pulmonary artery bypass for main pulmonary artery stenosis caused by neoplasm

2012 ◽  
Vol 144 (1) ◽  
pp. e10-e11
Author(s):  
Ryo Aeba ◽  
Hiroaki Nomori ◽  
Ryohei Yozu
Keyword(s):  
Pulmonary Artery ◽  
Artery Bypass ◽  
Main Pulmonary Artery ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis

scholarly journals Main Pulmonary Artery Stenosis Caused by Fibrocalcified Mass in a Young Infant

2002 ◽  
Vol 17 (4) ◽  
pp. 560 ◽  
Author(s):  
Heon Seok Han ◽  
Jeong Hyun Park ◽  
Deok Soo Kim ◽  
Seog Jae Lee ◽  
Jang Soo Hong ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Young Infant ◽  
Main Pulmonary Artery ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis

Successful living donor liver transplantation after stent implantation in a patient with Alagille syndrome and severe bilateral pulmonary artery stenosis

2018 ◽  
Vol 28 (12) ◽  
pp. 1465-1467 ◽  
Author(s):  
Kentaro Akagi ◽  
Toshikatsu Tanaka ◽  
Shiro Baba
Keyword(s):  
Liver Transplantation ◽  
Pulmonary Artery ◽  
Living Donor ◽  
Living Donor Liver Transplantation ◽  
Main Pulmonary Artery ◽  
Alagille Syndrome ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis ◽  
Donor Liver ◽  
Donor Liver Transplantation

AbstractSevere pulmonary hypertension is a contraindication for liver transplantation owing to high mortality. However, decision-making regarding the treatment approach for patients with bilateral peripheral pulmonary artery stenosis, typically complicated by elevated main pulmonary artery and right ventricle pressures, can be challenging. Here, we report successful living donor liver transplantation after bilateral pulmonary artery stent implantation in a patient with Alagille syndrome, severe bilateral peripheral pulmonary artery stenosis, and extremely high main pulmonary artery and right ventricle pressures.

P885 Pulmonary artery stent implantation in an adult with chronic thromboembolic pulmonary stenosis

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
E A Khalifa ◽  
S Helmy ◽  
F Elallus ◽  
S F Mohamed ◽  
M Alkuwari
Keyword(s):  
Pulmonary Hypertension ◽  
Pulmonary Artery ◽  
Right Ventricular ◽  
Stent Implantation ◽  
Pulmonary Valve ◽  
Main Pulmonary Artery ◽  
Left Ventricular ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis ◽  
The Right

Abstract Introduction Pulmonary artery stenosis presenting in adults is rare. Chronic thromboembolic pulmonary hypertension (CTEPH) is by far the most common cause of pulmonary artery stenosis. Stenosis in these patients are not caused by an abnormality of the arterial wall itself, but by intraluminal narrowing as a result of the only partially resolved and organized thromboembolism. In contrast to paediatric patients, in adults with pulmonary artery stenosis, pulmonary stenting is not routinely performed. Case report A 51-year male, smoker, diabetic, hypertensive, and with chronic kidney disease. He was diagnosed two years earlier with bilateral multiple pulmonary emboli and was maintained on oral anticoagulation therapy. Recently, he presented with gradually progressive shortness of breath and signs of right ventricular failure. Diagnostic imaging: 1-Transthoracic and transesophageal echocardiography showed normal global systolic left ventricular function with no regional wall motion abnormalities, dilated right ventricle (RV) with moderately impaired function, severe pulmonic valve incompetence, mild tricuspid incompetence and a severely elevated right ventricular systolic pressure (RVSP) of 82 mmHg. In addition, a small rounded mass (6 x 11 mm) was visualized attached to the posterior wall of the RV outflow tract (RVOT) about 15mm proximal to the pulmonary valve annulus, (figure A). 2- Computed tomography pulmonary angiography showed a right main pulmonary artery (RPA) with circumferential narrowing, which was highly suggestive of chronic thrombosis. There was an abrupt tapering noted in the segmental branches of the right lower lobar pulmonary artery, with non-opacification of the distal arteries. No contrast opacification was noted in the right upper lobe pulmonary arteries. The left main pulmonary artery showed thickening of its bifurcation, again suggestive of chronic thrombosis, with narrowing of its left upper lobar branch, (figures B&C). 3-Cardiac magnetic resonance (CMR) showed a non enhancing RVOT mass protruding through the incompetent pulmonary valve during systole with features suggestive of a thrombus. Management In view of the clinical history, CTEPH was considered to be the most likely aetiology of the pulmonary hypertension. The decision was to perform balloon angioplasty and stent implantation in the RPA. Immediately after the procedure, RVSP was reduced from 80 to 50 mmHg. The clinical course after this procedure was uncomplicated and the patient showed significant clinical improvement. Follow up CMR showed patent stent with improvement of RV function ( fig D) Abstract P885 Figure.

scholarly journals Novel arterioplasty of severe left pulmonary artery stenosis using native main pulmonary artery

2020 ◽  
Vol 36 (1) ◽  
pp. 345-348
Author(s):  
Jineel H. Raythatha ◽  
Bharat V. Dalvi ◽  
Himanshu Choudhury ◽  
Krishnanaik Shivaprakasha
Keyword(s):  
Pulmonary Artery ◽  
Main Pulmonary Artery ◽  
Left Pulmonary Artery ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis

scholarly journals Early single-stage surgical revascularization of pulmonary artery in unilateral absence of a pulmonary artery

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Wenlei Li ◽  
Li Ma ◽  
Shuliang Xia ◽  
Minghui Zou ◽  
Weidan Chen ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Main Pulmonary Artery ◽  
Single Stage ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis ◽  
Aortopulmonary Window ◽  
Percutaneous Balloon ◽  
Z Value ◽  
Antegrade Flow

Abstract Background This research aims to summarize the findings of the early single-stage revascularization of remnant pulmonary artery in unilateral absent intrapericardial pulmonary artery. Methods We retrospectively analyzed the medical records of 10 patients with unilateral absent pulmonary artery, in which 7 were right and 3 were left, the median age and mean weight at surgery was 4 months and 5.6 kg, respectively. The patients received operation from January 2009 to June 2020. Results Ten patients, 1 case associated with atrial septal defect, 2 cases with tetralogy of Fallot, and 1 case with aortopulmonary window. The mean diameter of the affected hilar pulmonary artery remnants was 3.14 ± 1.09 mm (1.6-5 mm), and the Z value was − 3.66 ± 1.86 (range, − 6.7 to − 1.75). All the patients received single-stage revascularization: tube graft interposition in 3 patients, autologous pericardial roll in 4, direct anastomosis in one, and main pulmonary artery flap angioplasty in the rest 3. No hospital deaths occurred. Mean follow-up in this cohort was 3.3 ± 1.9 years One case underwent percutaneous balloon dilatation due to new pulmonary artery stenosis. Nonetheless, the results were encouraging, symptoms have improved in all patients. The median Z value of the latest ipsilateral pulmonary artery diameter was − 1.88 (range, − 4.52 to − 1.35), a significantly improvement when compared to the preoperative value. The Z value of that in patients who using Gore-Tex tube increased relatively small. Conclusions Single-stage pulmonary artery revascularization is effective at restoring normal antegrade flow to the affected lung, resulting in improved diameter of the PA, regression of pulmonary hypertension, and patient’s symptoms. Revascularization by using the autologous tissue or autologous pericardium may obtain a preferred result. The new pulmonary artery stenosis certainly will need to be addressed in the long-term follow-up.

scholarly journals Pulmonary artery stenting in a patient with Takayasu’s arteritis using a novel balloon-expandable covered stent

2019 ◽  
Vol 7 ◽  
pp. 2050313X1984195 ◽  
Author(s):  
Barry S Weinstock ◽  
Yitzhak Daniel Haim
Keyword(s):  
Pulmonary Artery ◽  
Takayasu’S Arteritis ◽  
Main Pulmonary Artery ◽  
Covered Stent ◽  
Artery Stenosis ◽  
Pulmonary Artery Stenosis ◽  
Interventional Treatment ◽  
Takayasu's Arteritis ◽  
Increased Risk ◽  
Pulmonary Artery Rupture

Patients with Takayasu’s arteritis have pulmonary artery involvement more commonly than previously appreciated. The majority of these lesions are in segmental or sub-segmental arteries, but there are some patients who have severe stenosis of the main pulmonary arteries. Interventional treatment of these patients is technically feasible, but there are only limited case reports describing such intervention. Balloon angioplasty and stenting in these lesions often require high pressure inflations to achieve adequate results and thus has increased risk due to the possibility of pulmonary artery rupture. The recently approved Viabahn BX balloon-expandable covered stent may be an optimal device for main pulmonary artery stenosis as it is relatively low profile, can be over-expanded to large vessel diameter without compromise or disruption of the polytetrafluoroethylene covering and virtually eliminates the risk of catastrophic pulmonary artery rupture. We report here the first known use of this novel stent for treatment of severe pulmonary artery stenosis.

scholarly journals 3D Simulation Analysis of Central Shunt in Patient-Specific Hemodynamics: Effects of Varying Degree of Pulmonary Artery Stenosis and Shunt Diameters

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jiawei Liu ◽  
Haiyun Yuan ◽  
Neichuan Zhang ◽  
Xiangyu Chen ◽  
Chengbin Zhou ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Simulation Analysis ◽  
Main Pulmonary Artery ◽  
Left Pulmonary Artery ◽  
Artery Stenosis ◽  
Patient Specific ◽  
Pulmonary Artery Stenosis ◽  
Ct Data ◽  
Dynamics Models ◽  
Artery Flow

The objective of this study was to compare the effects of different shunt diameters and pulmonary artery (PA) stenosis grades on the hemodynamics of central shunts to determine an optimal surgical plan and improve the long-term outcomes of the operation. A 3D anatomical model was reconstructed based on the patient’s clinical CT data. 3D computational fluid dynamics models were built with varying degrees of stenosis (the stenosis ratio α was represented by the ratio of blood flow through the main pulmonary artery to cardiac output, ranging from 0 to 30%; the smaller the value of α, the more severe the pulmonary artery stenosis) and varying shunt diameters (3, 3.5, 4, 4.5, and 5 mm). Our results show that the asymmetry of pulmonary artery flow increased with increasing shunt diameter and α, which will be more conducive to the development of the left pulmonary artery. Additionally, the pulmonary-to-systemic flow ratio (QP/QS) increases with the shunt diameter and α, and all the values exceed 1. When the shunt diameter is 3 mm and α = 0%, QP/QS reaches the minimum value of 1.01, and the oxygen delivery reaches the maximum value of 205.19 ml/min. However, increasing shunt diameter and α is beneficial to reduced power loss and smoother PA flow. In short, for patients with severe PA stenosis (α is small), a larger-diameter shunt may be preferred. Conversely, when the degree of PA stenosis is moderate, a smaller shunt diameter can be considered.

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