A Comparative Study of the Main Pulmonary Artery and Ascending Aorta Biomechanical Behavior

2011 ◽  
Author(s):  
Bahar Fata ◽  
Elena Galdi ◽  
Michael S. Sacks
Keyword(s):  
Pulmonary Artery ◽  
Mechanical Behavior ◽  
Ductus Arteriosus ◽  
Main Pulmonary Artery ◽  
Blood Flow Rate ◽  
Biomechanical Properties ◽  
Ascending Aorta ◽  
External Diameter ◽  
Blood Flows ◽  
Biomechanical Behavior

During the prenatal period a state of physiologic pulmonary hypertension exists due to the equalization of pressures by the patent ductus arteriosus, resulting in similar wall thickness of the ascending aorta (AA) and main pulmonary artery (MPA). After birth, as the ductus arteriosus closes and pulmonary arterial pressure decreases, attenuation of medial smooth muscle occurs such that the ratio of medial thickness to external diameter decreases from about 25% in fetuses to less than 10% in infants 3 to 6 months of age. After the first year of life, thickness of the MPA is normally less than half that of the adjacent ascending aorta, although the diameters of the two great arteries remain the same relative to one another [1]. During homeostatic conditions, the total pulmonary and systemic blood flows are essentially identical. In spite of their comparable blood flow rate and common embryologic origin, the anatomic characteristics of these two segments of the cardiovascular system differ substantially [2]. Futhremore, both these arteries are affected by many congenital abnormalities and also are subject to hypertension. Knowledge of the normal biomechanical properties of these great arteries is important for surgical treamtment, angioplasty, and tissue engineering. It can also provide insight into the disease processes and is a prerequisite to the study of mechanical behavior during disease conditions. In this study we characterized the biaxial mechanical behavior of both arteries as a function of location, which has not been previously performed in the pulmonary trunk.

scholarly journals Anomalous Origin of Left Pulmonary Artery From Ascending Aorta: Embryological Model

2021 ◽  
Author(s):  
Bin Li ◽  
Aijun Liu ◽  
Ming Yang ◽  
Junwu Su
Keyword(s):  
Pulmonary Artery ◽  
Congenital Heart ◽  
Left Subclavian Artery ◽  
Ductus Arteriosus ◽  
Main Pulmonary Artery ◽  
Left Pulmonary Artery ◽  
Ascending Aorta ◽  
Anomalous Origin ◽  
Left Wall ◽  
Heart Malformation

Background Anomalous origin of the left pulmonary artery (ALPA) from the ascending aorta (AA) is a rare congenital heart malformation. Aim To give some of our embryological considerations of ALPA from the AA. Methods We present a patient with ALPA from the AA, right-sided aortic arch, right-sided ductus arteriosus (DA), and aberrant left subclavian artery (LSCA). Results The distal end of ALPA was cut off, the proximal end was sutured, and the distal end was directly anastomosed to the left wall of the main pulmonary artery (MPA). Conclusion The failure of migration and differentiation of cardiac neural crest cells at the fourth and sixth archs result in unilateral arch agenesis or failure of detachment of the left sixth arch from the aortic sac, which form ALPA the AA.

scholarly journals Pulmonary atresia with a ventricular septal defect and left pulmonary artery discontinuity: a case report 

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Hyun-Hwa Cha ◽  
Hae Min Kim ◽  
Won Joon Seong
Keyword(s):  
Pulmonary Artery ◽  
Subclavian Artery ◽  
Septal Defect ◽  
Left Subclavian Artery ◽  
Ductus Arteriosus ◽  
Main Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Pulmonary Atresia ◽  
Left Pulmonary Artery ◽  
Right Pulmonary Artery

Abstract Background Unilateral pulmonary artery discontinuity is a rare malformation that is associated with other intracardiac abnormalities. Cases accompanied by other cardiac abnormalities are often missed on prenatal echocardiography. The prenatal diagnosis of isolated unilateral pulmonary artery discontinuity can also be delayed. However, undiagnosed this malformation would have an effect on further prognosis. We report our case of a prenatal diagnosis of pulmonary atresia with ventricular septal defect and left pulmonary artery discontinuity. Case presentation A 33-year-old Asian woman visited our institution at 24 weeks of gestation because of suspected fetal congenital heart disease. Fetal echocardiography revealed a small atretic main pulmonary artery giving rise to the right pulmonary artery without bifurcation and the left pulmonary artery arising from the ductus arteriosus originating from the left subclavian artery. The neonate was delivered by cesarean section at 376/7 weeks of gestation. Postnatal echocardiography and multidetector computed tomography showed a right aortic arch, with the small right pulmonary artery originating from the atretic main pulmonary artery and the left pulmonary artery originating from the left subclavian artery. Patency of the ductus arteriosus from the left subclavian artery was maintained with prostaglandin E1. Right ventricular outflow tract reconstruction and pulmonary angioplasty with Gore-Tex graft patch was performed 25th day after birth. Unfortunately, the neonate died because of right heart failure 8 days postoperation. Conclusion There is a possibility that both pulmonary arteries do not arise from the same great artery (main pulmonary artery or common arterial trunk). Therefore, clinicians should check the origin of both pulmonary arteries.

A Case of Main Pulmonary Artery Aneurysm Associated with Patent Ductus Arteriosus

1989 ◽  
Vol 19 (2) ◽  
pp. 343
Author(s):  
Hong Lyeol Lee ◽  
Myong Ki Hong ◽  
Kyung Kwon Paik ◽  
Seung Jae Tahk ◽  
Woong Ku Lee ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Patent Ductus Arteriosus ◽  
Ductus Arteriosus ◽  
Main Pulmonary Artery ◽  
Artery Aneurysm ◽  
Pulmonary Artery Aneurysm ◽  
Patent Ductus

scholarly journals Rehabilitation of pulmonary arteries: hybrid treatment in the unilateral absence of the pulmonary artery.

2021 ◽  
Author(s):  
Jorge Cervantes-Salazar ◽  
Jose García-Montes ◽  
Henry Peralta-Santos ◽  
Diego Ortega-Zhindón ◽  
Juan Calderón-Colmenero
Keyword(s):  
Pulmonary Artery ◽  
Respiratory Infections ◽  
Ductus Arteriosus ◽  
Main Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Surgical Reconstruction ◽  
Hybrid Strategy ◽  
Right Pulmonary Artery ◽  
History Of ◽  
Bilateral Ductus Arteriosus

We present two patients with history of recurrent respiratory infections, fatigue and sweating. They were diagnosed with absence of connection between the main pulmonary artery (MPA) and right pulmonary artery (RPA) and bilateral ductus arteriosus, with the RPA originating from the ductus arteriosus. Treatment was approached with a hybrid strategy: percutaneous intraluminal angioplasty with a right intraductal stent and device closure of the left ductus arteriosus and followed by surgical reconstruction with interposition of a graft from RPA to MPA. Both patients had a favorable outcome.

scholarly journals Advanced multimodality imaging of an anomalous vessel between the ascending aorta and main pulmonary artery in a dog

2014 ◽  
Vol 16 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Lauren E. Markovic ◽  
Heidi B. Kellihan ◽  
Alejandro Roldán-Alzate ◽  
Randi Drees ◽  
Dale E. Bjorling ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Multimodality Imaging ◽  
Main Pulmonary Artery ◽  
Ascending Aorta

scholarly journals Image quality and attenuation values of multidetector CT coronary angiography using high iodine-concentration contrast material: A comparison of the use of iopromide 300 and iopromide 370

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
A K M Darwish ◽  
M M Farouk ◽  
H Hafez ◽  
A Adel
Keyword(s):  
Image Quality ◽  
Pulmonary Artery ◽  
Coronary Arteries ◽  
Main Pulmonary Artery ◽  
Iodine Concentration ◽  
Ascending Aorta ◽  
P Value ◽  
Group A ◽  
The Mean ◽  
Attenuation Values

Abstract Background Iodine concentration is one of the main determinants of arterial enhancement in CTA, and current low-osmolar and iso-osmolar nonionic CM for intravascular administration still come in a handful of molecules, but a relatively wide range of different iodine concentrations. This gives the opportunity to optimize CTA protocols as a function of several factors such as patient characteristics, CT technology, and CM features in an attempt to maximize the diagnostic yield of CTA examinations while considering patient safety and avoiding unnecessary extra costs. Objective To compare image quality and attenuation values of multidetector CT coronary angiography (MDCT) between iopromide 300 and iopromide 370 and to evaluate whether the higher iodine contrast material has better image quality or not. Material and Methods Patients were prospectively enrolled and were randomized into two groups (group A, 30 patients received iopromide 300, iodine flux 1.2g I/s; group B, 30 patients received iomeprol 370, iodine flux 1.48g I/s). CT attenuation values were measured in the proximal end coronary arteries,ascending aorta and main pulmonary artery. The image quality of 15 coronary artery segments was graded by cardiologist in consensus with the use of a four-point scale (1 excellent enhancement to 4 poor enhancement). Non-parametric statistical approaches were used to compare the two groups. Results No statistically significant differences were found between the mean attenuation values (302 HU for iopromide 300 and 326 HU for iopromide 370, P = 0.175) in the coronary arteries in the two groups. The mean attenuation value of the proximal ascending aorta (AA)and main pulmonary artery (MPA) was found to be 345+/-63 HU and 241+/- 89 in group A respectively, whereas the mean attenuation value in proximal ascending aorta and main pulmonary artery in group B was found to be 348+/-74 and 238+/- 50 respectively. No significant difference was found between iopromide 300 and iopromide 370 in terms of contrast enhancement at the level of great arteries, P value AA = 0.826 and P value for MPA = 0.884. 92.9% of coronary arterial segments got score (range 1–2) in group A whereas 93.6 of coronary arterial segments got score (range 1-2) in group with no statistically significant difference P value = 0.755. Conclusion With the current CT technology iopromide 300 is not inferior to iopromide 370 in terms of coronary artery attenuation values and image quality. Iopromide 300 provides similar enhancement of coronary arteries and excellent image quality as compared with iopromide 370 using identical amount of total iodine with fewer cost and less estimated adverse effects owing to low iodine concentration of iopromide 300.

scholarly journals Successful sparing approach between the ascending aorta and the main pulmonary artery to the giant coronary aneurysm of the left main coronary artery

2020 ◽  
Vol 13 (4) ◽  
pp. e234203
Author(s):  
Ken Nakamura ◽  
Kouan Orii ◽  
Takayuki Abe ◽  
Hirofumi Haida
Keyword(s):  
Coronary Artery ◽  
Pulmonary Artery ◽  
Left Main Coronary Artery ◽  
Main Pulmonary Artery ◽  
Coronary Aneurysm ◽  
Ascending Aorta ◽  
Left Main ◽  
Giant Coronary Aneurysm

Coronary aneurysm located just above the left main coronary artery (LMT) is rare and difficult to treat. How the aneurysm is accessed is very important as it determines the result of the surgery. A 70-year-old man with a large coronary aneurysm (40 mm in diameter) in the LMT underwent surgery to prevent its rupture; however, there was severe adhesion. Initially, dissection of the ascending aorta or the pulmonary artery seemed necessary to access the aneurysm; however, the process was possible with limited dissection between the ascending aorta and the pulmonary artery, and we succeeded in firmly closing the LMT site of entry.

Anomalous origin of the left main pulmonary artery from the ascending aorta associated with Digeorge syndrome

1995 ◽  
Vol 75 (17) ◽  
pp. 1294-1295 ◽  
Author(s):  
Hidemi Dodo ◽  
Juan C. Alejos ◽  
Joseph K. Perloff ◽  
Hillel Laks ◽  
Davis C. Drinkwater ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Digeorge Syndrome ◽  
Main Pulmonary Artery ◽  
Ascending Aorta ◽  
Anomalous Origin ◽  
Left Main
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