In-Vitro Pulsatile Flow Visualization Studies in a Pulmonary Artery Model

1985 ◽  
Vol 107 (4) ◽  
pp. 368-375 ◽  
Author(s):  
E. Philpot ◽  
A. P. Yoganathan ◽  
H.-W. Sung ◽  
Y.-R. Woo ◽  
R. H. Franch ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Flow Visualization ◽  
Pulsatile Flow ◽  
Main Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Deceleration Phase ◽  
Right Pulmonary Artery ◽  
The Right

In-vitro pulsatile flow visualization studies were conducted in an adult-sized pulmonary artery model to observe the effects of valvular pulmonic stenosis on the flow fields of the main, left and right pulmonary arteries. The flow patterns revealed that as the degree of stenosis increased, the jet-type flow created by the valve became narrower, and it impinged on the far (distal) wall of the left pulmonary artery further downstream from the junction of the bifurcation. This in turn led to larger regions of disturbed turbulent flow, as well as helical-type secondary flow motions in the left pulmonary artery, compared to the right pulmonary artery. The flow field in the main pulmonary artery also became more disturbed and turbulent, especially during peak systole and the deceleration phase. The flow visualization observations have been valuable in helping to conduct further quantitative studies such as pressure and velocity field mapping. Such studies are important to understanding the fluid mechanics characteristics of the main pulmonary artery and its two major branches.

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.

Blood Flow Velocity Profiles in Pulmonary Branch Arteries in Lambs

1995 ◽  
Vol 117 (2) ◽  
pp. 237-241
Author(s):  
H. Katayama ◽  
G. W. Henry ◽  
C. L. Lucas ◽  
B. Ha ◽  
J. I. Ferreiro ◽  
...  
Keyword(s):  
Blood Flow ◽  
Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Maximum Velocity ◽  
Left Pulmonary Artery ◽  
Control Group ◽  
Pulsed Doppler Ultrasound ◽  
Right Pulmonary Artery ◽  
Blood Flow Velocities ◽  
The Right

We studied the detailed profiles of blood flow in the right and left pulmonary arteries using 20 MHz pulsed Doppler ultrasound equipment in a lamb model. Fourteen lambs aged four to six weeks were selected. In six lambs, monocrotaline pyrrole was injected parenterally to create pulmonary hypertension (PH group). Eight other lambs served as unaltered controls (control group). The blood flow velocities were sampled in 1mm increments along the anterior—posterior axis of the branch arteries. The maximum velocity of the forward flow in the left pulmonary artery was higher than that in the right pulmonary artery in the control group (71.7 ± 15.9cm/s vs 60.2 ± 13.5; p < 0.05). The fastest backward flow was located at the posterior position of the vessel in the right pulmonary artery in the control group. No significant bias in location was shown in the left pulmonary artery. Using indices of P90, acceleration time, P90*AcT, the velocity waveforms in the PH group were compared with those in the control group. In the left pulmonary artery, every index in the control group showed a significantly greater value that in the PH group. On the other hand, no significant differences were found between either group in the right pulmonary artery.

Non-confluent pulmonary arteries in a patient with pulmonary atresia and intact ventricular septum: ? a 5th aortic arch with a systemic-to-pulmonary arterial connection

2000 ◽  
Vol 10 (4) ◽  
pp. 419-422 ◽  
Author(s):  
Astolfo Serra ◽  
Francisco Chamie ◽  
R.M. Freedom
Keyword(s):  
Pulmonary Artery ◽  
Aortic Arch ◽  
Pulmonary Arteries ◽  
Pulmonary Atresia ◽  
Left Pulmonary Artery ◽  
Ventricular Septum ◽  
Intact Ventricular Septum ◽  
Right Pulmonary Artery ◽  
Pulmonary Arterial ◽  
The Right

AbstractMajor abnormalities of pulmonary circulation are uncommon in the patient with pulmonary atresia and intact ventricular septum. Non-confluent pulmonary arteries have only rarely been described in this setting. In this case report, we describe a patient in whom the pulmonary arteries are non-confluent, with the right pulmonary artery supplied through a right-sided arterial duct, and the left pulmonary artery most likely through a fifth aortic arch, thus providing a systemic-to-pulmonary arterial connection. We discuss the various forms of non-confluent pulmonary arteries in the setting of pulmonary atresia and intact ventricular septum.

scholarly journals Pulmonary artery sling in a symptomatic newborn

2021 ◽  
Vol 13 (3) ◽  
pp. 254-257
Author(s):  
İlker Mercan ◽  
Muhammet Akyuz ◽  
Onur Işık
Keyword(s):  
Pulmonary Artery ◽  
Respiratory Symptoms ◽  
Main Pulmonary Artery ◽  
Left Pulmonary Artery ◽  
Uneventful Recovery ◽  
Pulmonary Artery Sling ◽  
Right Pulmonary Artery ◽  
Pulmonary Arterial ◽  
The Right ◽  
Artery Branch

Pulmonary arterial sling (PAS) is a relatively rare congenital anomaly in which left pulmonary artery branch originates abnormally from the right pulmonary artery, eventually resulting with respiratory symptoms, due to airway obstruction. In this report, we present a PAS in a neonate who showed progressive respiratory distress in the second week following delivery. At 25 days of age, the patient underwent total surgical correction of the anomaly, during which left pulmonary artery reimplantation to main pulmonary artery without the use of cardiopulmonary bypass was employed. Following an uneventful recovery, the patient was discharged eighteen days after surgery.

scholarly journals Partial Anomalous Left Pulmonary Artery Sling in an Adult

2020 ◽  
Vol 10 ◽  
pp. 5
Author(s):  
Pierre D. Maldjian ◽  
Kevin R. Adams
Keyword(s):  
Pulmonary Artery ◽  
Incidental Finding ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Pulmonary Trunk ◽  
Pulmonary Artery Sling ◽  
Airway Compression ◽  
Right Pulmonary Artery ◽  
Left Pulmonary Artery Sling ◽  
The Right

We report a case of a partial anomalous left pulmonary artery sling in an adult patient as an incidental finding on computed tomography. There is a normal bifurcation of the pulmonary trunk into right and left pulmonary arteries with anomalous origin of the left upper lobe pulmonary artery from the right pulmonary artery. The anomalous vessel passes between the trachea and esophagus forming a partial left pulmonary artery sling without airway compression.

scholarly journals The role of modern imaging techniques in the diagnosis of malposition of the branch pulmonary arteries and possible association with microdeletion 22q11.2

2012 ◽  
Vol 23 (2) ◽  
pp. 181-188 ◽  
Author(s):  
Goran Cuturilo ◽  
Danijela Drakulic ◽  
Aleksandar Krstic ◽  
Marija Gradinac ◽  
Tamara Ilisic ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Imaging Techniques ◽  
Heart Defects ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Modern Imaging ◽  
Right Pulmonary Artery ◽  
Rare Malformation ◽  
22Q11.2 Microdeletion ◽  
The Right

AbstractMalposition of the branch pulmonary arteries is a rare malformation with two forms. In the typical form, pulmonary arteries cross each other as they proceed to their respective lungs. The “lesser form” is characterised by the left pulmonary artery ostium lying directly superior to the ostium of the right pulmonary artery, without crossing of the branch pulmonary arteries. Malposition of the branch pulmonary arteries is often associated with other congenital heart defects and extracardiac anomalies, as well as with 22q11.2 microdeletion. We report three infants with crossed pulmonary arteries and one adolescent with “lesser form” of the malformation. The results suggest that diagnosis of malposition of the branch pulmonary arteries could be challenging if based solely on echocardiography, whereas modern imaging technologies such as contrast computed tomography and magnetic resonance angiography provide reliable establishment of diagnosis. In addition, we performed the first molecular characterisation of the 22q11.2 region among patients with malposition of the branch pulmonary arteries and revealed a 3-megabase deletion in two out of four patients.

scholarly journals Hidden pulmonary arteries in tetralogy of Fallot and pulmonary artery pressure in patients operated with a pulmonary artery

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mohammadreza Edraki ◽  
Bahram Ghasemzadeh ◽  
Kambiz Keshavarz ◽  
Ahmadali Amirghofran ◽  
Hamid Mohammadi ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Tetralogy Of Fallot ◽  
Pulmonary Vein ◽  
Ductus Arteriosus ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Pulmonary Artery Hypertension ◽  
Surgical Correction ◽  
Right Pulmonary Artery ◽  
The Right

Abstract Introduction The absence of a pulmonary artery is a rare congenital anomaly that occurs isolated or with other congenital cardiac disorders, particularly tetralogy of Fallot (TOF); meanwhile, a hidden pulmonary artery might exist and originate from a closed ductus arteriosus (DA), which can be stented to reach the artery. Material and methods This prospective study describes cardiac catheterization of nine TOF patients diagnosed with the absence of the left pulmonary artery before the operation. The patients were stratified into three groups: group one, whose closed DA was found and connected to the hidden pulmonary artery with a stent; group two, whose hidden pulmonary arteries were found via the pulmonary vein angiography; and group three, for whom we could not find the remnant of the DA, or our attempt to stent the DA to the hidden pulmonary artery was not successful. We also evaluated outcomes of six other surgically-corrected TOF patients who were operated with the absent left pulmonary artery. Results The first group included the patients aged 1, 24, and 30 months, whose CT angiography 6–9 months after stenting showed acceptable left pulmonary artery diameter for surgical correction, and the pulmonary vein angiography of the second group showed a hidden left pulmonary artery with a suitable diameter for surgical correction. However, we were unable to find or stent the DA of group three patients, aged 12, 38, 60, and 63 months. Earlier Angiography might have increased the chance of access to the hidden vessel. Apart from these three groups, follow-ups of six other patients previously corrected with only the right pulmonary artery revealed pulmonary artery hypertension in all patients. Conclusion The concealed pulmonary artery might be found, and stenting of the closed DA to it might be performed to improve the diameter of the diminutive pulmonary artery. This procedure may allow TOF total surgical correction with two pulmonary arteries. Besides, pulmonary vein angiography can reveal the hidden pulmonary artery.

scholarly journals Existence of Hidden Pulmonary Arteries in Tetralogy of Fallot and pulmonary artery hypertension in patients Operated with one Pulmonary Artery

2020 ◽  
Author(s):  
Mohammadreza Edraki ◽  
Bahram Ghasemzadeh ◽  
Kambiz Keshavarz ◽  
Ahmadali Amirghofran ◽  
Hamid Mohammadi ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Tetralogy Of Fallot ◽  
Pulmonary Vein ◽  
Ductus Arteriosus ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Pulmonary Artery Hypertension ◽  
Surgical Correction ◽  
Right Pulmonary Artery ◽  
The Right

Abstract Introduction: The absence of a pulmonary artery is a rare congenital anomaly that occurs isolated or with other congenital cardiac disorders, particularly tetralogy of Fallot (TOF); meanwhile, a hidden pulmonary artery might exist and originate from a closed ductus arteriosus (DA), which can be stented to reach the artery.Material and methods: This prospective study describes cardiac catheterization of nine TOF patients diagnosed with the absence of the left pulmonary artery before the operation. The patients were stratified into three groups: group one, whose closed DA was found and connected to the hidden pulmonary artery with a stent; group two, whose hidden pulmonary arteries were found via the pulmonary vein angiography; and group three, for whom we could not find the remnant of the DA, or our attempt to stent the DA to the hidden pulmonary artery was not successful.We also evaluated outcomes of six other surgically-corrected TOF patients who were operated with the absent left pulmonary artery.Results: The first group included the patients aged 1, 24, and 30 months, whose CT angiography 6-9 months after stenting showed acceptable left pulmonary artery diameter for surgical correction, and the pulmonary vein angiography of the second group showed a hidden left pulmonary artery with a suitable diameter for surgical correction.However, we were unable to find or stent the DA of group three patients, aged 12, 38, 60, and 63 months. Earlier Angiography might have increased the chance of access to the hidden vessel. Apart from these three groups, follow-ups of six other patients previously corrected with only the right pulmonary artery revealed pulmonary artery hypertension in all patients.Conclusion: The concealed pulmonary artery might be found, and stenting of the closed DA to it might be performed to improve the diameter of the diminutive pulmonary artery. This procedure may allow TOF total surgical correction with two pulmonary arteries. Besides, pulmonary vein angiography can reveal the hidden pulmonary artery.

Pulmonary hypertension induced with an intra-arterial balloon: an alternate mechanism

1986 ◽  
Vol 61 (2) ◽  
pp. 746-751 ◽  
Author(s):  
T. C. Lloyd ◽  
C. E. Juratsch
Keyword(s):  
Pulmonary Artery ◽  
Arterial Pressure ◽  
Main Pulmonary Artery ◽  
Balloon Catheter ◽  
Pulmonary Arteries ◽  
Pressure Rise ◽  
Left Ventricular ◽  
Balloon Inflation ◽  
Right Pulmonary Artery ◽  
The Right

The Laks catheter is a triple-lumen balloon catheter used to distend the canine main pulmonary artery while recording right ventricular pressure and the arterial pressure distal to the balloon. A rise in arterial pressure reported to occur during distension has been attributed to vasoconstriction rather than passive obstruction by the balloon. We tested this in six anesthetized dogs by inflating the Laks catheter-balloon while recording pressure distal to the balloon from the Laks catheter as well as from additional catheters in right and left pulmonary arteries placed retrogradely through lobar branches following thoracotomy. We found that balloon inflation increased pressures in the arterial port of the Laks catheter and in the left pulmonary artery catheter but reduced it in the right pulmonary artery. Tightening a snare around the right pulmonary artery had the same effects on pressures. Similar results were obtained while cardiac output was controlled by left ventricular bypass perfusion in four dogs. We conclude that the Laks catheter-balloon obstructs flow to the right lung and that the arterial pressure rise recorded in it during balloon inflation cannot be distinguished from that caused by occlusion of the right pulmonary artery.

scholarly journals The Management of Left Pulmonary Artery Sling in Senegal: Our Experience from One Case

2017 ◽  
Vol 10 (1) ◽  
pp. 94-96
Author(s):  
Mohamed Leye ◽  
IdrissaDemba Ba ◽  
Ababacar Mbengue ◽  
Adama Sawadogo ◽  
Fatou Aw ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Congenital Heart ◽  
Distal Part ◽  
Surgical Repair ◽  
Main Pulmonary Artery ◽  
Left Pulmonary Artery ◽  
Pulmonary Artery Sling ◽  
Right Pulmonary Artery ◽  
Left Pulmonary Artery Sling ◽  
The Right

Pulmonary Artery Sling (PAS) is a rare congenital heart disease due to abnormal origin of Left Pulmonary Artery (LPA) from the Right Pulmonary Artery (RPA), then encircling the distal part of the trachea. The treatment is a surgical repair consisting of reimplantation of the LPA on the main pulmonary artery over cardiopulmonary bypass. The authors report a clinical case of PAS in a 5.5 years old boy diagnosed in Senegal then successfully operated in France.Cardiovasc. j. 2017; 10(1): 94-96

Sign in / Sign up

Export Citation Format

Share Document