743 results on '"Main Pulmonary Artery"'
Search Results
702. Aneurysm of the main pulmonary artery
- Author
-
George Smith
- Subjects
medicine.medical_specialty ,business.industry ,Arteries ,Pulmonary Artery ,medicine.disease ,Aneurysm ,Cardiovascular System ,Main Pulmonary Artery ,Internal medicine ,medicine ,Cardiology ,Humans ,Surgery ,business - Published
- 1959
703. Velocity profiles in the main pulmonary artery of dogs and man, measured with a thin-film resistance anemometer
- Author
-
S. R. Reuben, G. de J. Lee, and J. P. Swadling
- Subjects
Physiology ,business.industry ,Transverse axis ,Instantaneous velocity ,Thoracic Surgery ,Anatomy ,Pulmonary Artery ,Thorax ,medicine.disease ,Pulmonary hypertension ,Main Pulmonary Artery ,Dogs ,Anemometer ,medicine.artery ,Cuff ,Pulmonary artery ,Medicine ,Animals ,Humans ,In patient ,Cardiology and Cardiovascular Medicine ,business ,Nuclear medicine ,Rheology ,Blood Flow Velocity - Abstract
Instantaneous velocity of pulmonary artery blood was measured using a thin-film resistance anemometer mounted on a hypodermic needle. Studies were performed, at thoracotomy, in five dogs and five patients. Instantaneous blood velocity was recorded at several sites across the transverse axis of the main pulmonary artery to determine the shape of the velocity profile. We found the velocity profile, in both man and dog, to be approximately flat. In dog, the mean velocity, normalized to that at the center line, ranged from 1.18 (SD ± 0.03) to 0.81 (SD ± 0.27). In man, mean velocity of pulmonary artery blood, normalized in a similar fashion, ranged from 1.08 (SD ± 0.03) to 0.84 (SD ±0.07), while the normalized peak systolic velocity ranged from 1.04 (SD ± 0.07) to 0.95 (SD ± 0.16). The results, in dogs, suggest that there is little asymmetry of the velocity profile and therefore these have been taken as evidence that the use of cuff electromagnetic flowmeters on the pulmonary artery of dogs is not subject to significant inaccuracies associated with a nonsymmetrical flow profile. The finding of a relatively flat velocity profile in patients, moreover, will make it easier for catheter-tip flowmeters to measure bulk velocity in the pulmonary artery.
- Published
- 1970
704. Pulmonary artery aneurysms; report of a case treated by surgical intervention
- Author
-
Brian Blades, William B. Ford, and Patrick Clark
- Subjects
medicine.medical_specialty ,Pulmonary Circulation ,Lung ,business.industry ,Pulmonary Artery ,medicine.disease ,Aneurysm ,Main Pulmonary Artery ,Surgery ,medicine.anatomical_structure ,Physiology (medical) ,medicine.artery ,Pulmonary artery ,medicine ,Humans ,Left main pulmonary artery ,Radiology ,Cardiology and Cardiovascular Medicine ,Ligation ,business ,Surgical treatment - Abstract
The successful surgical treatment of an aneurysm of the left main pulmonary artery is reported. It appears that, after ligation of the main pulmonary artery, it is desirable not to remove the lung but preserve it as a space occupying organ which will retain some function. Literature on the subject of pulmonary aneurysms is reviewed.
- Published
- 1950
705. Response of the main pulmonary artery of dogs to neuronally released versus blood-borne norepinephrine
- Author
-
Alfred P. Fishman, Jan P. Szidon, and R. H. Ingram
- Subjects
Contraction (grammar) ,Physiology ,Phenoxybenzamine ,Hypothalamus ,Stimulation ,Blood Pressure ,Pulmonary Artery ,Norepinephrine ,Dogs ,medicine.artery ,medicine ,Animals ,Neurons ,Pancreatic Elastase ,Chemistry ,Neurosecretion ,Elastase ,Anatomy ,Elasticity ,Main Pulmonary Artery ,Vasomotor System ,medicine.anatomical_structure ,Pulmonary artery ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,Vasoconstriction ,medicine.drug ,Artery - Abstract
The effects of sympathetic nerve stimulation and of norepinephrine infusions on the dynamic elastic properties of the main pulmonary artery were studied in 20 anesthetized, open-chest dogs. Pulmonary arterial pressure and diameter were linearly related between 5 to 45 mm Hg and at heart rates of 40 to 200 beats/min. Sympathetic nerve stimulation changed the stiffness (pressure-diameter slope) of the pulmonary artery by +35%; infusion of norepinephrine (0.25 µg/kg/min) by only +14%. Diameter intercepts, determined by extrapolation of the linear pressure-diameter line, were unchanged during stimulation, but decreased significantly during the infusion of norepinephrine. Local application of norepinephrine to the wall duplicated the changes produced by sympathetic nerve stimulation. Histologically, the arrangement of smooth muscle in the outer layers of the media of the artery suggested linkage of smooth muscle with continuous elastic fibers, whereas smooth-muscle cells of the deeper layers of the media appeared to connect with each other, and elastic fibers were discontinuous. The topical application of elastase to the outer wall effected a loss of elastic fibers in the outer layers of the media. After elastase, neither stimulation nor norepinephrine infusions increased stiffness; diameter intercepts decreased with both. The observations are consistent with the idea that stiffening of this artery during nerve stimulation is produced by contraction of smooth muscle attached to elastic fibers and that the anatomical arrangement for stiffening is located in the outer layer of the media, where the sympathetic nerve endings are located. In contrast, blood-borne norepinephrine stimulates predominantly the inner layers.
- Published
- 1970
706. Aneurysm of the main pulmonary artery. Association with patent ductus arteriosus and ostium secundum defect
- Author
-
James R. Zuberbuhler, Willie K. Shull, and Siloo B. Kapadia
- Subjects
medicine.medical_specialty ,Cardiac Catheterization ,Adolescent ,Hypertension, Pulmonary ,Hemodynamics ,Pulmonary Artery ,Aneurysm ,Internal medicine ,medicine.artery ,Ductus arteriosus ,medicine ,Humans ,cardiovascular diseases ,Ductus Arteriosus, Patent ,Rupture, Spontaneous ,business.industry ,Heart Septal Defects ,medicine.disease ,Trunk ,Pulmonary hypertension ,Main Pulmonary Artery ,Surgery ,medicine.anatomical_structure ,Pulmonary artery ,cardiovascular system ,Cardiology ,Female ,Autopsy ,business ,Respiratory Insufficiency ,Artery - Abstract
Aneurysms of the main pulmonary artery are rare. They are usually associated with congenital cardiac defects, particularly those leading to pulmonary hypertension. In the past, syphilitic and mycotic aneurysms of this artery have been reported. In true aneurysms, dilatation tends to be confined to the trunk of the artery, and degenerative changes can be demonstrated in the wall. True aneurysms must be differentiated from the dilatation of the major branches of the pulmonary artery which usually accompanies absent pulmonic valve with ventricular septal defect. Such dilatation is also seen in some cases of tetrology of Fallot following surgical correction.1The following report concerns a child with an aneurysm of the pulmonary artery. Follow-up extended over a 13-year period. Numerous hemodynamic and radiographic studies were performed, and rupture of the aneurysm was demonstrated at postmortem examination. Report of a Case This 15-year-old white girl was first referred for cardiac evaluation
- Published
- 1970
707. Transient murmur simulating pulmonary artery stenosis in premature infants
- Author
-
Lisa M. Dunkle and Richard D. Rowe
- Subjects
Male ,congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,Cardiac Catheterization ,Time Factors ,Birth weight ,education ,Blood Pressure ,Pulmonary Artery ,Infant, Newborn, Diseases ,Internal medicine ,medicine.artery ,medicine ,Birth Weight ,Humans ,cardiovascular diseases ,Pulmonary artery stenosis ,Arterial stenosis ,business.industry ,Incidence (epidemiology) ,Infant, Newborn ,Phonocardiography ,medicine.disease ,Hypoplasia ,Main Pulmonary Artery ,Surgery ,Pulmonary Valve Stenosis ,Pediatrics, Perinatology and Child Health ,Pulmonary artery ,cardiovascular system ,Cardiology ,Female ,Vascular Resistance ,business ,Infant, Premature ,Heart Auscultation - Abstract
The incidence of a transient murmur resembling that of pulmonary arterial stenosis in healthy premature infants during the first six weeks of life was 67% (ten of 15) whereas only 5% of term infants (three of 61) were noted to have such a murmur during the few days spent in hospital. None of 25 term infants examined at home during the first four weeks of life had the murmur. The murmur was most frequently seen in babies with a birth weight below 2,200 gm (5 lb). Hypoplasia of the pulmonary artery branches or unusual alignment of the main pulmonary artery with its branches in premature infants are postulated as causes of the murmur which disappears as the infant grows.
- Published
- 1972
708. The effect of heparin on the early resolution of pulmonary emboli in the dog
- Author
-
Ivo D. Vellar and E. F. O'sullivan
- Subjects
medicine.medical_specialty ,Pulmonary Artery ,Dogs ,Weight loss ,Internal medicine ,Medicine ,Animals ,cardiovascular diseases ,Lung ,business.industry ,Experimental model ,Heparin ,Fibrinolysis ,General Medicine ,Arteries ,respiratory tract diseases ,Main Pulmonary Artery ,Disease Models, Animal ,medicine.anatomical_structure ,cardiovascular system ,Cardiology ,Surgery ,medicine.symptom ,business ,Pulmonary Embolism ,circulatory and respiratory physiology ,medicine.drug - Abstract
An experimental model has been developed to study the effect of heparin on pulmonary emboli in the dog. This has demonstrated that emboli impacted in the “lobar” arteries of the dog's lung lose an appreciable amount of their weight in 24 hours, and that this weight loss remains the same despite adequate anti-coagulation with heparin. Massive emboli lodging in the main pulmonary artery have their weight loss at 24 hours approximately doubled by heparin. The implications of these results in the behaviour of pulmonary emboli in the human are discussed.
- Published
- 1972
709. Clinical Experience with the Use of Aortic Valve Homografts for Reconstruction of the Pulmonary Artery, Pulmonary Valve, and Outflow Portion of the Right Ventricle
- Author
-
Richard D. Rowe, Vincent L. Gott, and Clarence S. Weldon
- Subjects
Adult ,Heart Defects, Congenital ,Heart Septal Defects, Ventricular ,Male ,Aortic valve ,congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,Adolescent ,Hemodynamics ,Pulmonary Artery ,Defect closure ,Postoperative Complications ,Physiology (medical) ,Internal medicine ,medicine.artery ,medicine ,Humans ,Transplantation, Homologous ,cardiovascular diseases ,Child ,Pulmonary wedge pressure ,Pulmonary Valve ,business.industry ,Pulmonary Valve Insufficiency ,Main Pulmonary Artery ,body regions ,surgical procedures, operative ,medicine.anatomical_structure ,Ventricle ,Aortic Valve ,Pulmonary valve ,Pulmonary artery ,cardiovascular system ,Cardiology ,Cineangiography ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Four patients with ventricular septal defect, infundibular right ventricular obstruction, and associated abnormalities of the pulmonary valve or main pulmonary artery have been treated by a combination of ventricular septal defect closure, infundibular myomectomy, and insertion of an aortic homograft into the pulmonary circulation. Pulmonary valvular competence has been restored in all four cases. A single fatality has resulted, and was associated with bacterial destruction of the homograft. The hemodynamics of pulmonary valvular insufficiency are discussed, and indications for homograft replacement of the pulmonary valve are outlined.
- Published
- 1968
- Full Text
- View/download PDF
710. Unilateral rib notching due to systemic to pulmonary anastomoses in the presence of bilateral pulmonary oligemia
- Author
-
James R. Foster and Graham A. H. Miller
- Subjects
Adult ,Lung Diseases ,Male ,medicine.medical_specialty ,Pulmonary Circulation ,business.industry ,medicine.medical_treatment ,Collateral Circulation ,Ribs ,Tissue Adhesions ,Anastomosis ,Pleural Diseases ,Collateral circulation ,Pleural adhesions ,Main Pulmonary Artery ,Surgery ,Notching ,Exploratory thoracotomy ,medicine ,Humans ,Thoracotomy ,Cardiology and Cardiovascular Medicine ,business - Abstract
This report describes a patient with absence of the main pulmonary artery in whom unilateral rib notching developed in association with vascular pleural adhesions seen at exploratory thoracotomy. This notching can be explained by systemic to pulmonary collateral circulation through the pleural adhesions. A role of thoracotomy in causing further development of adhesions and notching is suggested. When unilateral rib notching is attributed to this mechanism it is usually associated with unilateral pulmonary oligemia. This case demonstrates that flow through pleural adhesions can explain unilateral rib notching in the presence of bilaterally equal pulmonary oligemia. Vascular pleural adhesions were confirmed in only 2 of 15 other cases of unilateral rib notching attributed to this mechanism, and the notching developed after thoracotomy in only 1 other case.
- Published
- 1969
711. Effect of prednisone on the noradrenaline-indeced cell proliferation in the arterial wall
- Author
-
U. Di Tondo, C. Cavallero, Paolo Sarti, and M. N. Pericoli
- Subjects
Male ,medicine.medical_specialty ,Pulmonary Artery ,Tritium ,Gastroenterology ,Cellular and Molecular Neuroscience ,Norepinephrine ,Entire aorta ,Prednisone ,Internal medicine ,Medicine ,Animals ,Arterial wall ,Molecular Biology ,Aorta ,Pharmacology ,Cell growth ,business.industry ,Drug Synergism ,Cell Biology ,Main Pulmonary Artery ,Molecular Medicine ,Rabbits ,business ,Cell Division ,medicine.drug ,Thymidine - Abstract
Si e studiata la morfologia e la proliferazione cellulare che si instaura nella media dell'aorta e dell'arteria polmonare di conigli sottoposti a trattamento con noradrenalina e con noradrenalina-prednisone facendo uso del metodo autoradiografico dopo somministrazione di3H timidina. Le lesioni e la proliferazione della muscolatura della media che si attuano in seguito a somministrazione di noradrenalina vengono sensibilmente aggravate dal trattamento contemporaneo con prednisone.
- Published
- 1973
712. Surgical correction of coarctation of the main pulmonary artery
- Author
-
Wendell B. Thrower, Dwight E. Harken, and Walter H. Abelmann
- Subjects
medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Thoracic Surgery ,Surgical correction ,Pulmonary Artery ,Trunk ,Pulmonic valvular stenosis ,Aortic Coarctation ,Surgery ,Constriction ,Main Pulmonary Artery ,Pulmonary Valve Stenosis ,Physiology (medical) ,medicine.artery ,Pulmonary artery ,medicine ,Humans ,Radiology ,Cardiac Surgical Procedures ,Cardiology and Cardiovascular Medicine ,business ,Cardiac catheterization - Abstract
Two cases of pure congenital coarctation of the main pulmonary artery are reported. One case may be unique in that it represents the first report of an anatomically proved constriction located in the middle third of the main trunk. In this patient, successful open correction under hypothermia was carried out with cinematographic documentation. The results of preoperative and postoperative cardiac catheterization are described. A plea is made for the routine use of open operation for correction of "pure pulmonic valvular stenosis." This allows better correction when the diagnosis is confirmed and flexibility for treatment if the unusual coarctation or constriction of the pulmonary artery is encountered.
- Published
- 1960
713. Vascular malformation overlying the pulmonary artery simuating a patent ductus arteriosus
- Author
-
Joseph M. Ryan, Calvin B. Ernst, and Karl P. Klassen
- Subjects
congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,Fistula ,Vascular Malformations ,Coronary Vessel Anomalies ,Arteriovenous fistula ,Pulmonary Artery ,Physiology (medical) ,Ductus arteriosus ,medicine.artery ,Internal medicine ,Medicine ,Humans ,cardiovascular diseases ,Ductus Arteriosus, Patent ,business.industry ,Vascular malformation ,Ductus Arteriosus ,medicine.disease ,Coronary Vessels ,Main Pulmonary Artery ,Shunt (medical) ,medicine.anatomical_structure ,Pulmonary artery ,Arteriovenous Fistula ,cardiovascular system ,Cardiology ,Cardiology and Cardiovascular Medicine ,business ,Ligation - Abstract
An arteriovenous fistula with aneurysmal dilatation involving branches of both coronary vessels and the pulmonary artery is discussed. The malformation was limited to the main pulmonary artery and presented a small left-to-right shunt without symptoms. Ligation of the supplying vessels resulted in the disappearance of a murmur typical of a patent ductus arteriosus.
- Published
- 1961
714. Aberrant left pulmonary artery
- Author
-
Arthur H. Rosenblum
- Subjects
Male ,medicine.medical_specialty ,Adolescent ,Obstructive emphysema ,Pulmonary Artery ,Internal medicine ,medicine.artery ,medicine ,Humans ,Child ,Lung ,business.industry ,Infant, Newborn ,Infant ,Left pulmonary artery ,respiratory system ,Airway obstruction ,medicine.disease ,Surgery ,Main Pulmonary Artery ,Airway Obstruction ,medicine.anatomical_structure ,Pulmonary Emphysema ,Right Main Bronchus ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Pulmonary artery ,Cardiology ,business ,Blood vessel ,Follow-Up Studies - Abstract
To the Editor.—The article by Clarkson et al entitled "Aberrant Left Pulmonary Artery" (Amer J Dis Child113:373-377, 1967) makes reference to our reported case "Anomalous Left Pulmonary Artery Causing Obstruction To Right Main Bronchus", by Potts et al (JAMA155:1409-1411, 1954). This infant was recognized a few hours after birth as having had an obstructive emphysema involving the right lung. It was concluded preoperatively that this infant suffered from external pressure on the right bronchus and the lower trachea. It was concluded that this condition must be due to an aberrant blood vessel. At surgery, a complete anatomic correction was made by Dr. Potts. The left pulmonary artery was clamped at its origin from the main pulmonary artery. This child made a completely uneventful recovery and remained perfectly well following the surgery. For the first few months after the surgery, there were occasional attacks of a very mild
- Published
- 1967
715. Adjustable prosthesis for pulmonary artery banding. Comparison with umbilical tape and teflon bands
- Author
-
William E. Jaques, Campbell Gs, Garman O. Kimmell, and Ramon A. Shane
- Subjects
business.industry ,medicine.medical_treatment ,technology, industry, and agriculture ,Anatomy ,Pulmonary Artery ,Steel ball ,Stainless Steel ,Prosthesis ,Main Pulmonary Artery ,Pulmonary artery banding ,Blood Vessel Prosthesis ,medicine.anatomical_structure ,Dogs ,Fluorocarbon Polymers ,Blood vessel prosthesis ,Physiology (medical) ,medicine.artery ,Pulmonary artery ,medicine ,Animals ,Cardiology and Cardiovascular Medicine ,business ,Saddle ,Artery - Abstract
An adjustable, stainless-steel "ball and saddle" prosthesis has been devised for banding the main pulmonary artery in dogs. Comparisons were made between this prosthesis and circumferential cotton umbilical and Teflon tape banding in 20 dogs. The vessel lumen and pressure gradient across the banded area returned to normal after release of the ball and saddle band, but not after release of the circumferential tape bands. However, microscopic damage to the banded artery was noted in all dogs, with attenuation of the media being most evident in dogs with the steel ball and saddle prosthesis.
- Published
- 1967
716. Pressure-volume response of isolated living main pulmonary artery in dogs
- Author
-
Wallace G. Frasher and Sidney S. Sobin
- Subjects
medicine.medical_specialty ,Isolation (health care) ,Physiology ,Biophysics ,Blood Pressure ,In Vitro Techniques ,Pulmonary Artery ,Biophysical Phenomena ,Dogs ,Physiology (medical) ,Internal medicine ,medicine ,Pressure ,Animals ,business.industry ,Extracorporeal circulation ,Elastic Tissue ,Elasticity ,Main Pulmonary Artery ,Surgery ,Femoral Artery ,Perfusion ,Carotid Arteries ,Cardiology ,Pressure volume ,business - Abstract
Isolation of the main pulmonary artery by obturation of the right and left branches under conditions which maintained vasal circulation to the wall was achieved by extracorporeal circulation. Pressure-volume response of the segment was measured directly using a reciprocating essentially sinusoidal volume input at rates of 90, 45, and 180 cycles/min. Using volumes which generated physiologic pressures, a steady-state response starting from rest occurred in 300—500 cycles. At steady state the pressure-volume response was linear and unchanged by these cycling rates. The relaxation pattern during the initial phase was consistent with a single mode of response and closely duplicated the stress-relaxation pattern of a single noncycled input of the same volume. In 34 experiments in 11 animals steady-state volume distensibility (DeltaV x 100/V0 DeltaP) was 2.51% cm H2O. Segment geometry was preserved by luminal casting. An ellipsoidal configuration was apparent in the distended state. pulmonary-artery distensibility; mechanical behavior of arteries; stress-relaxation; geometry of arteries; tethering; viscoelastic properties of arteries; dynamic elastic response; coefficient of distensibility Submitted on June 16, 1964
- Published
- 1965
717. Successful Removal Through the Pulmonary Artery of a Tumor Arising from the Ventricular Septum: A Case Report*
- Author
-
Carleton B. Chapman, Richard W. Ernst, Eldon K. Siebel, Fouad A. Bashour, and Joseph C. Ogle
- Subjects
medicine.medical_specialty ,business.industry ,Thrombosis ,Articles ,Arteries ,Ventricular Septum ,Pulmonary Artery ,Medical Records ,Main Pulmonary Artery ,Heart Neoplasms ,Pulmonary Valve Stenosis ,Heart neoplasms ,Internal medicine ,Neoplasms ,Cardiology ,Medicine ,Humans ,Surgery ,business - Published
- 1962
718. Massive occlusion of the main pulmonary artery and primary branches; case report
- Author
-
Jorma M. Leinassar and Nelson R. Niles
- Subjects
medicine.medical_specialty ,business.industry ,Coronary arteriosclerosis ,Thrombosis ,Pulmonary Artery ,medicine.disease ,Medical Records ,Pulmonary embolism ,Main Pulmonary Artery ,Physiology (medical) ,medicine.artery ,Internal medicine ,Clinical diagnosis ,Pulmonary artery ,Occlusion ,Cardiology ,Medicine ,Humans ,Myocardial infarction ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,Pulmonary Embolism - Abstract
This case of massive thrombotic occlusion of the main pulmonary artery is reported because of the size, extent, and duration of the process, because of the prominent findings leading to the correct clinical diagnosis, and, finally, because of the interesting secondary pathologic changes including myocardial infarction without significant coronary arteriosclerosis or occlusion.
- Published
- 1958
719. Massive pulmonary embolism without infarction
- Author
-
Cohen G, Josse Kaye, B. Tabatznik, and A. Sandler
- Subjects
medicine.medical_specialty ,Embolism ,Ischemia ,Infarction ,Medical Records ,Embolus ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Arterial wall ,cardiovascular diseases ,Lung ,business.industry ,Thrombosis ,General Medicine ,medicine.disease ,Main Pulmonary Artery ,Pulmonary embolism ,medicine.anatomical_structure ,Cardiology ,Radiology ,business ,Pulmonary Embolism - Abstract
Four cases of embolism in the main pulmonary artery without infarction are described. These cases suggest that a “veiling” of the lung occurs on the affected side. The ischaemia with diminished or absent vascularisation resulting in a more translucent radiological picture as described by Westermark was not seen in our cases. The necessity for following up a larger series of cases paying particular attention to the degree of organisation or adherence of the embolus to the arterial wall appears desirable.
- Published
- 1958
720. Technique and preliminary results of selective catheterization of patients with Blalock-Taussig shunts
- Author
-
Robert I. White
- Subjects
congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,Cardiac Catheterization ,Heart malformation ,Cyanotic congenital heart disease ,Pulmonary Artery ,Internal medicine ,medicine.artery ,medicine ,Pulmonary angiography ,Humans ,Radiology, Nuclear Medicine and imaging ,Cerebral Ventriculography ,Technology, Radiologic ,Oxygen saturation (medicine) ,Pulmonary Valve ,business.industry ,Blood Pressure Determination ,Main Pulmonary Artery ,Oxygen ,Catheter ,Evaluation Studies as Topic ,Pulmonary artery ,Cardiology ,Tetralogy of Fallot ,Radiology ,Polyethylenes ,business - Abstract
A technique for retrograde catheterization of the pulmonary artery through patent Blalock-Taussig shunts is described. Pulmonary artery pressure and oxygen saturation are determined and pulmonary angiography is performed via this catheter. The angiographic anatomy of the main pulmonary artery and its branches was demonstrated better by this technique than by conventional right ventriculography in 11 patients with severe cyanotic congenital heart disease.
- Published
- 1972
721. Pulse wave velocity in the main pulmonary artery of the dog
- Author
-
Jack D. Bargainer
- Subjects
Pulmonary Circulation ,Serotonin ,Physiology ,Chemistry ,Hemodynamics ,Beat (acoustics) ,Blood Pressure ,Input impedance ,Dyne ,Pulmonary Artery ,Characteristic impedance ,Main Pulmonary Artery ,Nuclear magnetic resonance ,Dogs ,Animals ,Phase velocity ,Cardiology and Cardiovascular Medicine ,Pulse wave velocity ,Elastic modulus ,Blood Flow Velocity - Abstract
Apparent phase velocities in the main pulmonary artery were calculated from simultaneous measurements of pressure at two sites in 11 anesthetized, open-chest dogs, at heart rates ranging from 24 to 240 beat/min. The distribution of apparent phase velocity with harmonic frequency was similar to that reported previously for input impedance and frequency. Phase velocity in the absence of reflections, estimated by averaging apparent phase velocities at frequencies from 9 to 23 cycle/sec, averaged 275 cm/sec in the control state and 417 cm/sec during the infusion of 5-hydroxytryptamine (serotonin). The elastic modulus of the pulmonary arterial wall implied by these velocities was calculated to be approximately 1.2 x 10 6 dyne/cm 2 in the controls and 2.7 x 10 6 dyne/cm 2 during serotonin. These results are consistent with previous observations on normal pulmonary vascular input impedance in the dog under these conditions, and with the relationships predicted by the Womersley equations, and suggest that the effects of serotonin on the input impedance spectrum are due in part to an increase in pulse wave velocity.
- Published
- 1967
722. Altered arterio-venous relationship in pulmonary diseases and its haemodynamic significance
- Author
-
M. Pajewski
- Subjects
Lung Diseases ,Pulmonary Circulation ,Lung ,business.industry ,Pulmonary Fibrosis ,Respiration ,Hemodynamics ,General Medicine ,Anatomy ,Pulmonary Artery ,Lung pathology ,Vascular architecture ,Main Pulmonary Artery ,Bronchiectasis ,Radiography ,medicine.anatomical_structure ,Pulmonary Emphysema ,Pulmonary Veins ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Disease process ,business ,Tomography - Abstract
The distortion of the gross pulmonary vascular architecture was analysed in fifty representive cases of various types of lung pathology by latero-oblique tomography. It was found that disease processes in the lung may affect differently the arteries and veins because of the spatial divergence between the arterial and venous trees. Hilar displacement invariably alters the mutual relationship of the main pulmonary artery and venous confluences which in turn affects the course of their branches. An inspiratory pattern of arteries and veins was observed in compensatory, overdistended, but otherwise intact lung segments. The inspiratory pattern of veins alone, was seen in the overdistended periphery of segments or lobes, the core of which was affected by a disease process. It is postulated that the inspiratory vascular patterns represent local adjustments of vascular capacity produced by extravascular mechanical forces acting on the outer circumferences of the vessels.
- Published
- 1970
723. A palliative operation for certain infants with aortic arch interruption
- Author
-
Richard Van Praagh, S. Bert Litwin, and William F. Bernhard
- Subjects
Pulmonary and Respiratory Medicine ,Heart Defects, Congenital ,Male ,medicine.medical_specialty ,Cardiac Catheterization ,Pulmonary Circulation ,Aorta, Thoracic ,Pulmonary Artery ,Young infants ,Aortic arch interruption ,Ductus arteriosus ,medicine.artery ,Internal medicine ,Methods ,Medicine ,Pulmonary blood flow ,Humans ,Ligation ,business.industry ,Palliative Care ,Infant, Newborn ,Infant ,Synthetic graft ,Ductus Arteriosus ,Main Pulmonary Artery ,Blood Vessel Prosthesis ,medicine.anatomical_structure ,Descending aorta ,Pulmonary artery ,cardiovascular system ,Cardiology ,Cineangiography ,Surgery ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
A palliative operation for young infants with Type B aortic arch interruption was performed in 4 babies under 1 month of age. A tubular synthetic graft was placed between the main pulmonary artery and the descending aorta, thus creating an artificial ductus. Following this, the pulmonary artery was banded to decrease pulmonary blood flow and pulmonary artery pressure and the ductus arteriosus was ligated. Two infants weighing 1.9 and 3.5 kg. at the time of operation survived and are improved 18 and 36 months postoperatively, respectively.
- Published
- 1972
724. Transaxial or short axis right ventricular volume measurements - which method correlates more closely with main pulmonary artery flow values in children aged 9 years?
- Author
-
Keith M. Godfrey, Charles Peebles, Lucy Davies, Jennifer A Bryant, Mark A. Hanson, and Alison Fletcher
- Subjects
Medicine(all) ,lcsh:Diseases of the circulatory (Cardiovascular) system ,medicine.medical_specialty ,Technologist Presentation ,Short axis ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,business.industry ,Orientation (computer vision) ,Magnetic resonance imaging ,Bioinformatics ,medicine.disease ,Main Pulmonary Artery ,Transverse plane ,lcsh:RC666-701 ,Medicine ,Ventricular volume ,Radiology, Nuclear Medicine and imaging ,Cardiology and Cardiovascular Medicine ,business ,Nuclear medicine ,Stroke ,Angiology - Abstract
Background In adults right ventricular (RV) measurements from datasets acquired in the transaxial orientation have been found to be more accurate and reproducible than in the short axis plane. Cardiovascular magnetic resonance imaging (CMRI) in children is prone to image misregistration due to less consistent breath-holding which may be more problematic when imaging in the transaxial plane. This study aimed to determine the most accurate method for RV volume evaluation in children. Methods 216 healthy children aged 9 years underwent CMRI as part of a study of developmental influences on cardiovascular structure and function. Contiguous steady state free precession breath-hold cine images were obtained to cover the RV in both short axis and transaxial planes. RV stroke volumes (SV) were compared with flow data derived from phase contrast velocity flow mapping sequences through the main pulmonary artery (MPA). Results
- Full Text
- View/download PDF
725. Misleading echocardiographic diagnosis of anomalous origin of the right coronary artery from the pulmonary artery
- Author
-
Ornella Milanesi, Giovanni Stellin, and Guido Michielon
- Subjects
Coronary angiography ,medicine.medical_specialty ,Aorta ,business.industry ,General Medicine ,Main Pulmonary Artery ,Coronary arteries ,medicine.anatomical_structure ,Internal medicine ,Right coronary artery ,medicine.artery ,Pediatrics, Perinatology and Child Health ,Pulmonary artery ,medicine ,Cardiology ,Animal study ,Cardiology and Cardiovascular Medicine ,business ,Sinus (anatomy) - Abstract
We report on a case of a newborn with echocardiographic diagnosis of anomalous origin of the right coronary artery from the main pulmonary artery. Intraoperative inspection demonstrated a proximal anomalous course of the right coronary artery but a normal origin from the right sinus of Vansalva of the Aorta. We suggest a complete investigation, including coronary angiography, when isolated and rare congenitaj malformations of the coronary arteries are suspected.
726. Calcified Aneurysm of the Main Pulmonary Artery: A Complication of Banding
- Author
-
Claude Pernot, Worms Am, Jean Claude Hoeffel, Pierre Genot, and M. Henry
- Subjects
Heart Septal Defects, Ventricular ,Male ,medicine.medical_specialty ,Radiography ,Pulmonary Artery ,Surgical Equipment ,Calcified aneurysm ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,cardiovascular diseases ,Heart septal defect ,business.industry ,Foreign-Body Reaction ,Calcinosis ,Infant ,medicine.disease ,Aneurysm ,Constriction ,Main Pulmonary Artery ,medicine.anatomical_structure ,cardiovascular system ,Cardiology ,Radiology ,Complication ,business ,Artery - Abstract
The authors report a case of calcified aneurysm of the main pulmonary artery following banding. The cotton band had migrated to the bifurcation of the artery. The calcified aneurysm was discovered four years after banding and remained unchanged for six years. It has since been successfully removed.
- Published
- 1974
- Full Text
- View/download PDF
727. Rupture of syphilitic aneurysm of ascending aorta into main pulmonary artery: Successful emergency repair
- Author
-
Sharad Panday, Ashok Hishikar, and Jayant Karbhase
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Syphilitic aneurysm ,business.industry ,Internal medicine ,medicine.artery ,Ascending aorta ,medicine ,Cardiology ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Main Pulmonary Artery - Published
- 1982
- Full Text
- View/download PDF
728. Extended use of a pulmonary homograft for right ventricular outflow tract reconstruction
- Author
-
G.D. Angelini and J.M. Quaegebeur
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,Heart Ventricles ,Corrective surgery ,Ventriculo derecho ,Pulmonary Artery ,Ventriculotomy ,Main Pulmonary Artery ,Surgery ,body regions ,surgical procedures, operative ,medicine.anatomical_structure ,Internal medicine ,Pulmonary valve ,Methods ,medicine ,Cardiology ,Humans ,Ventricular outflow tract ,Cardiology and Cardiovascular Medicine ,business - Abstract
When a pulmonary homograft is used for reconstruction of the right ventricular outflow tract a patch or tube extension is usually required to close the gap in the right ventriculotomy. We describe here a simple method by which a large patch can be tailored from the homograft using the distal main pulmonary artery and its branches.
- Published
- 1989
- Full Text
- View/download PDF
729. Is pneumonectomy mandatory after transection of the left main pulmonary artery?
- Author
-
Ugonna N. Ihekweazu, Raja M. Flores, and William D. Travis
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Necrosis ,Lung ,business.industry ,medicine.medical_treatment ,Intrapericardial pneumonectomy ,medicine.disease ,Surgery ,Main Pulmonary Artery ,Sepsis ,Pneumonectomy ,medicine.anatomical_structure ,Anesthesia ,medicine ,Left main pulmonary artery ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Abstract
Transection of the main pulmonary artery (PA) is thought to be associated with necrosis of the lung, subsequent sepsis, and death. We report the management of a patient from an outside hospital who underwent an aborted pneumonectomy after transection of the left main PA. We eventually treated the patient with an intrapericardial pneumonectomy. However, the patient was always clinically well, and after pneumonectomy, pathology did not reveal signs of significant necrosis. Therefore, it is possible that a ligated PA is compatible with life.
- Full Text
- View/download PDF
730. Optimal flow rate of aorta-main pulmonary artery shunt
- Author
-
H. Mohri
- Subjects
Aorta ,medicine.medical_specialty ,business.industry ,Optimal flow ,General Medicine ,Main Pulmonary Artery ,Shunt (medical) ,medicine.artery ,Internal medicine ,Pediatrics, Perinatology and Child Health ,Cardiology ,Medicine ,Surgery ,business ,Pulmonary wedge pressure - Published
- 1982
- Full Text
- View/download PDF
731. EVALUATION FOR PDA IN PRETERM INFANTS UTILIZING 7.5 MEGAHERTZ 2-D BCHOCARDIOGRAPHY
- Author
-
G. Wesley Vick and James C. Huhta
- Subjects
congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,Pulsed doppler ,Aortography ,medicine.diagnostic_test ,business.industry ,Main Pulmonary Artery ,Surgery ,symbols.namesake ,medicine.anatomical_structure ,Lung disease ,Ductus arteriosus ,Descending aorta ,medicine.artery ,Pediatrics, Perinatology and Child Health ,cardiovascular system ,medicine ,symbols ,Radiology ,business ,Doppler effect - Abstract
Evaluation for patent ductus arteriosus (PDA) by both Doppler examination and direct two-dimensional (2-D) echocardiographic visualization has been reported in term infants and children. However, visualization of a PDA in preterm infants with lung disease has been more difficult. Utilizing a recently developed 7.5 MHz mechanical scanner with interfaced 2-D directed pulsed Doppler we evaluated our initial experience in 14 premature infants with lung disease. Doppler sampling was performed at the pulmonary end of the ductus arteriosus from a suprasternal approach. Patients ranged in age from 1 day to 30 days (mean 11 days) and from 510 to 2300 grams in weight (mean 1015 grams). Imaging of the ductus arteriosus was successful in 13/14 (93%). Doppler evaluation of flow in the main pulmonary artery and descending aorta was successful in all. In 8 infants the DA was closed by both 2-D echo and Doppler exam (excluded by retrograde aortography in 2). In 5 infants a PDA was present by both methods. In 1 infant the DA was patent by Doppler exam but could not be imaged adequately by 2-D echo. This markedly improved imaging capability should allow longitudinal noninvasive studies of PDA morphology in premature infants with lung disease.
- Published
- 1984
- Full Text
- View/download PDF
732. Invited letter concerning: Enlargeable prosthesis for banding the main pulmonary artery
- Author
-
James E. Lock
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Prosthesis ,Main Pulmonary Artery - Published
- 1989
- Full Text
- View/download PDF
733. Reply to the Editor: Invited letter concerning: Enlargeable prosthesis for banding the main pulmonary artery
- Author
-
Dennis J. Vince
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Prosthesis ,Main Pulmonary Artery - Published
- 1989
- Full Text
- View/download PDF
734. Dissociation of the ACh-induced hyperpolarization and relaxation by methylene blue or haemoglobin in the rat main pulmonary artery
- Author
-
Guifa Chen and Hikaru Suzuki
- Subjects
Pharmacology ,chemistry.chemical_compound ,Nuclear magnetic resonance ,Chemistry ,Hyperpolarization (biology) ,Methylene blue ,Main Pulmonary Artery - Published
- 1988
- Full Text
- View/download PDF
735. A Case of Main Pulmonary Artery Aneurysm Associated with Patent Ductus Arteriosus
- Author
-
Myong Ki Hong, Seung Nok Hong, You Sun Hong, Hong Lyeol Lee, Seung Jae Tahk, Woong Ku Lee, and Kyung Kwon Paik
- Subjects
medicine.medical_specialty ,Aneurysm ,medicine.anatomical_structure ,business.industry ,Internal medicine ,Ductus arteriosus ,medicine ,Cardiology ,medicine.disease ,business ,Main Pulmonary Artery - Published
- 1989
- Full Text
- View/download PDF
736. EFFECT OF EXPERIMENTAL CYANOSIS ON PLATELET SURVIVAL
- Author
-
A S Nadas, William I Norwood, Aldo R. Castaneda, Carol R Norwood, and J. Deane Waldman
- Subjects
medicine.medical_specialty ,business.industry ,Main Pulmonary Artery ,Left atrial ,Anesthesia ,Internal medicine ,Platelet survival ,Pediatrics, Perinatology and Child Health ,medicine ,Cardiology ,Platelet ,Autologous platelet ,business ,Shunt (electrical) - Abstract
In order to determine the effect of cyanosis on platelet survival, experimental cyanosis was produced in dogs by anastomosing the left atrial appendage to the main pulmonary artery. The six cyanotic animals used in this study had arterial O2 saturations of 71%-85% and elevated hematocrits. By one month following surgery, the 51chromium-labeled autologous platelet half-life (PHL) decreased 15%-60% from preoperative values: two cyanotic dogs had progressive reduction of PHL at two and three months. Mo reduction in PHL occured in three sham operated control animals. Survival of platelets exchanged between cyanotic and control animals was determined. Platelets from cyanotic dogs studied in control animals had a 69%-87% shorter survival than the autologous PHL of the control animals, indicating an abnormality intrinsic to the platelet produced in the cyanotic dog. Normal platelets from control animals transfused into cyanotic dogs had the identical reduced survival of autologous platelets in that cyanotic animal, suggesting that some determinant of transfused platelet survival is extrinsic to the platelet. Three months after shunt closure in two dogs, the reduced PHL has persisted.
- Published
- 1977
- Full Text
- View/download PDF
737. The course of artificially produced main pulmonary artery stenosis in the dog
- Author
-
David Goldring, M. Remsen Behrer, Marvin J. Friedenberg, Peter Lekkas, John Kissani, and Arygyrios A. Tsifutis
- Subjects
medicine.medical_specialty ,Stenosis ,business.industry ,Internal medicine ,Pediatrics, Perinatology and Child Health ,Cardiology ,medicine ,business ,medicine.disease ,Main Pulmonary Artery - Published
- 1964
- Full Text
- View/download PDF
738. Accuracy of Diagnosis of Pulmonary Embolism
- Author
-
J. George Teplick
- Subjects
medicine.medical_specialty ,business.industry ,General Medicine ,medicine.disease ,Pulmonary embolism ,Main Pulmonary Artery ,Embolism ,Feature (computer vision) ,Internal medicine ,Clinical diagnosis ,medicine ,Cardiology ,Radiology ,business - Abstract
To the Editor:— I would like to take issue with the statement in the excellent paper by Hildner and Ormond, entitled "Accuracy of the Clinical Diagnosis of Pulmonary Embolism" (202:564, 1967), that "no feature of routine roentgenograms of the chest was clearly helpful in diagnosing or excluding embolism." In 1964, studies of the size and appearance of the main pulmonary artery in chest roentgenograms of both normal individuals and of 44 patients with verified pulmonary embolism showed an increased width and convexity of the main pulmonary artery segment in more than half of those with embolism. These changes were sometimes quite marked. However, in many instances the increase in size of the pulmonary segment was minimal and subtle, yet quite apparent when compared with any available chest x-ray film of the same patient made prior to the embolism or with chest x-ray films made serially thereafter. Subsequent to publication of
- Published
- 1968
- Full Text
- View/download PDF
739. Replacement of Main Pulmonary Artery
- Author
-
Joseph W. Gilbert, Theodore Cooper, and Paul A. Ebert
- Subjects
congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,medicine.medical_treatment ,Hemodynamics ,Persistent truncus arteriosus ,Pulmonary Artery ,Prosthesis ,Dogs ,Internal medicine ,medicine.artery ,medicine ,Animals ,Tetralogy of Fallot ,business.industry ,Arteries ,medicine.disease ,Pulmonary artery hypoplasia ,Surgery ,Main Pulmonary Artery ,medicine.anatomical_structure ,Ventricle ,Pulmonary artery ,cardiovascular system ,Cardiology ,business - Abstract
Relief of right ventricular obstruction in tetralogy of Fallot often requires, in addition to infundibular resection, the insertion of an outflow-tract prosthesis. In certain instances correction of such malformations necessitates enlargement of the pulmonary artery by extension of a diamond-shaped right ventricular patch across the pulmonic valve ring for a considerable distance into this vessel. More severe pulmonary artery hypoplasia and varieties of persistent truncus arteriosus may be amenable to correction only if the main pulmonary artery is completely replaced by some type of graft. The results of experiments in which a vascular prosthesis was inserted between the right ventricle and a branch of the pulmonary artery have been reported previously.1A description of the technique and hemodynamic consequences attending replacement of the main pulmonary artery with a valveless graft comprise the subject of the present report. Method Adult mongrel dogs weighing 10 kg. to 16 kg. were anesthetized
- Published
- 1962
- Full Text
- View/download PDF
740. MAIN PULMONARY ARTERY AREA LIMITS EXERCISE CAPACITY IN PATIENTS LONG-TERM AFTER ARTERIAL SWITCH OPERATION FOR TRANSPOSITION OF THE GREAT ARTERIES (TGA)
- Author
-
Tim Takken, Gertjan T. Sieswerda, Mieke M. P. Driessen, Sebastiaan W.H. van Wijk, Vivan J.M. Baggen, N J.G. Jansen, Folkert J. Meijboom, Tim Leiner, Paul H. Schoof, and Hans M P J Breur
- Subjects
medicine.medical_specialty ,business.industry ,Transposition (telecommunications) ,Exercise capacity ,Main Pulmonary Artery ,Surgery ,Term (time) ,Great arteries ,Internal medicine ,medicine ,Cardiology ,In patient ,Cardiology and Cardiovascular Medicine ,business - Full Text
- View/download PDF
741. Computed tomographic pulmonary angiographic findings to predict adverse outcomes in acute pulmonary embolism
- Author
-
Juntima Euathrongchit, Athavudh Deesomchok, Chalerm Liwsrisakun, Theerakorn Theerakittikul, Atikun Limsukon, Chaiwat Bumroongkit, Pattraporn Tajarernmuang, and Chaicharn Pothirat
- Subjects
Mechanical ventilation ,medicine.medical_specialty ,Pathology ,Adverse outcomes ,business.industry ,medicine.medical_treatment ,medicine.disease ,Critical Care and Intensive Care Medicine ,Right ventricular dysfunction ,Pulmonary embolism ,Main Pulmonary Artery ,Computed tomographic ,Respiratory failure ,Internal medicine ,Poster Presentation ,Cardiology ,Pulmonary angiography ,Medicine ,business - Abstract
Computed tomographic pulmonary angiography (CTPA) has been used as a standard tool for diagnosing an acute pulmonary embolism (APE). The right ventricular (RV) strain signs may be used to predict adverse outcomes. However, the results are still controversial. The primary objective of our study was to evaluate the relationship between the RV strain signs and respiratory failure requiring mechanical ventilation or death in APE. The secondary objective was to identify clinical factors which related to those outcomes.
- Full Text
- View/download PDF
742. Should reference values for ventricular volumes and mass of children be indexed for body surface area, height or weight considering gender differences?
- Author
-
Matthias Gutberlet, Philipp Beerbaum, Samir Sarikouch, and Titus Kuehne
- Subjects
lcsh:Diseases of the circulatory (Cardiovascular) system ,medicine.medical_specialty ,Body Surface Area ,Significant Gender Difference ,Internal medicine ,Medicine ,Radiology, Nuclear Medicine and imaging ,Angiology ,Body surface area ,Medicine(all) ,Radiological and Ultrasound Technology ,business.industry ,Stroke Volume ,Stroke volume ,Main Pulmonary Artery ,lcsh:RC666-701 ,Reference values ,Cardiology ,Oral Presentation ,Ventricular volume ,Cardiology and Cardiovascular Medicine ,business ,Nuclear medicine ,human activities ,Ventricular Volume - Full Text
- View/download PDF
743. SHA 043. Aneurysmal dilatation of the main pulmonary artery and pseudoaneurysm of the right pulmonary artery after arterial switch operation for TGA
- Author
-
Arif Hussain, Ahmed A. Jamjoom, Hysam Baho, Amjad Kouatli, Jameel Al-Ata, and Salem Deraz
- Subjects
Pseudoaneurysm ,medicine.medical_specialty ,business.industry ,Internal medicine ,Cardiology ,Medicine ,business ,Pulmonary wedge pressure ,medicine.disease ,Right pulmonary artery ,Main Pulmonary Artery - Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.