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 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.

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.

Staged Repair of Van Praagh Truncus Type A3

2021 ◽  
Vol 12 (2) ◽  
pp. 286-290
Author(s):  
Srujan Ganta ◽  
Nicole Duster ◽  
Howaida El-Said ◽  
John Artrip ◽  
Rohit Rao ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Truncus Arteriosus ◽  
Drug Eluting Stent ◽  
Common Trunk ◽  
Arterial Trunk ◽  
Right Pulmonary Artery ◽  
Drug Eluting ◽  
The Right

Van Praagh (VP) A3 variant of truncus arteriosus (or common arterial trunk) is defined by only one pulmonary artery (usually the right) originating from the common trunk, while the other lung is supplied either by collaterals or a pulmonary artery arising from the aortic arch. This report describes a staged approach to manage a VP-A3 variant truncus arteriosus with ductal origin of the left pulmonary artery (LPA), a hypoplastic right pulmonary artery, and cyanosis. Initially, the ductal portion of the proximal LPA was stented with a Resolute Onyx drug-eluting stent. The pulmonary arteries grew and at four months of age had an acceptable McGoon ratio and Nakata index. The patient then underwent repair which included unifocalization of the branch pulmonary arteries, closure of the ventricular septal defect, and placement of a right ventricle-to-pulmonary artery homograft conduit.

Transposition of the great arteries {S,D,D} and absent proximal left pulmonary artery

1995 ◽  
Vol 5 (2) ◽  
pp. 199-201
Author(s):  
Dipak Kholwadwala ◽  
Vincent A. Parnell ◽  
Rubin S. Cooper
Keyword(s):  
Blood Flow ◽  
Pulmonary Artery ◽  
Pulmonary Blood Flow ◽  
Left Ventricular Outflow Tract ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Left Ventricular Outflow ◽  
The Right

while preferential blood flow to the rightpulmonary artery has been described in transposition of the great arteries with or without obstruction of the left ventricular outflow tract, this disparity of pulmonary blood flow is not present in newborns.1We report a newborn with transposition in whom there was discontinuity of the pulmonary arteries and ductal blood supply to the left pulmonary artery. To our knowledge, this entity has not been described in newborns with transposition of the great arteries {S,D,D}.

Discontinuous Pulmonary Artery

2016 ◽  
Vol 8 (1) ◽  
pp. 106-110 ◽  
Author(s):  
Osama Eltayeb ◽  
Michael C. Mongé ◽  
Andrada R. Popescu ◽  
Anne E. Sarwark ◽  
Tyler Harris ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Left Pulmonary Artery ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Essentially Normal ◽  
Collateral Arteries ◽  
Right Pulmonary Artery ◽  
The Right ◽  
Tomographic Angiography

We describe the diagnosis and surgical repair of a five-month-old infant with a congenital discontinuous right pulmonary artery. Initial echocardiogram failed to show the right pulmonary artery and revealed systemic left pulmonary artery pressure based on the tricuspid regurgitation jet. Computed tomographic angiography confirmed the diagnosis of discontinuous right pulmonary artery. The right pulmonary artery appeared essentially normal in size, and there were no significant aortopulmonary collateral arteries. Using cardiopulmonary bypass and aortic transection, we created an anastomosis between the right and the main pulmonary arteries augmented anteriorly by a pericardial patch. Postoperative lung perfusion scan demonstrated balanced pulmonary blood flow to the lungs. Pulmonary hypertension resolved over three weeks in the postoperative period, an expected outcome in this age-group.

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.

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