Prominent Aortic Knob: Causes & Reasons

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Possible Causes for Prominent Aortic Knob

Patent Ductus Arteriosus

With greater degrees of shunting, the chest x-ray may reveal a prominent main pulmonary artery, a prominent aortic knob, increased pulmonary vascular markings, and enlargement [youtube.com]

[…] pulmonary artery and aortic knob along upper left heart border; increased pulmonary markings Cardiac catheterization and angiography: only necessary prior to repair or in [amboss.com]

[…] pressure Color Doppler: demonstrates blood flow from the aorta into the pulmonary artery ECG: : normal in small PDA; left axis deviation due to LVH in large PDA Chest x-ray: prominent [amboss.com]

Aortic Valve Stenosis

Aortic stenosis In the center an aortic valve with severe stenosis due to rheumatic heart disease. The valve is surrounded by the aorta. The pulmonary trunk is at the lower right. The right coronary artery, cut lengthwise, is at the lower left. The left main coronary artery, also cut lengthwise, is on the right.[…] [en.wikipedia.org]

Marfan Syndrome

Marfan syndrome is an autosomal dominant disorder of the connective tissue. It was first described by the French pediatrician Antoine Marfan in 1896. There are more than 25-30 different signs and symptoms in Marfan syndrome which can be of variable intensity and differ from patient to patient. Some people may[…] [symptoma.com]

Axial Spondyloarthritis

Copy/Paste the key inputs from the product brochure, per guidance from Marketing. The axial spondyloarthritis (AxSpA) market boasts biologics representing two distinct drug classes, the blockbuster tumor necrosis factor-alpha (TNF-α) inhibitors (Amgen’s Enbrel, AbbVie’s Humira, Janssen’s Remicade and Simponi /[…] [decisionresourcesgroup.com]

Thoracic Aortic Aneurysm

An 87-year old man with a past medical history of a descending aortic aneurysm for 20 years presented with progressive dysphagia and aspiration pneumonia. Computed tomography angiography demonstrated the impending rupture of the thoracic aortic aneurysm (TAA) and endoscopic examinations revealed the extrinsic[…] [ncbi.nlm.nih.gov]

Ankylosing Spondylitis

Abstract The cauda equina syndrome in ankylosing spondylitis (the CES-AS syndrome) is marked by slow, insidious progression and a high incidence of dural ectasia in the lumbosacral spine. A high index of suspicion for this problem must be maintained when evaluating the patient with ankylosing spondylitis with a[…] [doi.org]

Extracranial Giant Cell Arteritis

Abstract A systematic literature search was performed to summarise current knowledge on extracranial giant cell arteritis (GCA), i.e. large-artery involvement in patients with or without clinically apparent temporal arteritis (cranial GCA). Extracranial GCA is increasingly recognised, both in patients with cranial GCA[…] [ncbi.nlm.nih.gov]

Dissecting Aortic Aneurysm

Herz. 1987 Jun;12(3):187-93. Abstract Real-time color flow mapping by two-dimensional Doppler has now come into widespread use. However, its application via conventional transcutaneous approaches to dissecting aortic aneurysm has some limitations where visualization of the descending aorta is concerned. Its[…] [ncbi.nlm.nih.gov]

Traumatic Aortic Rupture

Review Article First Online: 23 January 2013 561 Downloads 8 Citations Abstract A traumatic thoracic aortic injury is a severe and life-threatening clinical entity. Although largely fatal; if untreated, these injuries are amenable to surgical repair if appropriately diagnosed. Therefore, early triage of this condition is[…] [doi.org]

Discrete Fibromuscular Subaortic Stenosis

The heart size is usually normal in children, but a dilated ascending aorta or a prominent aortic knob may be seen occasionally in valvular AS, resulting from poststenotic [elearning.sumdu.edu.ua]

Aorto-Left Ventricular Tunnel

The aortic knob ( arrowheads ) is also prominent when there is significant aortic insufficiency. [radiologykey.com]

Fig. 10.4 Prominent ascending aorta ( arrows ) and aortic knob and cardiomegaly with a dilated left ventricle in an 11-year-old patient with a ventricular septal defect complicated [radiologykey.com]

This dilatation is caused by a poststenotic jet and increased blood flow volume from aortic regurgitation. [radiologykey.com]

Cervical Aortic Arch

knob is the prominent shadow of the aortic arch on a frontal chest radiograph. [14] Aortopexy is a surgical procedure in which the aortic arch is fixed to the sternum in [en.wikipedia.org]

Although the aortic knob on chest roentgenogram would be left sided, this is not always evident, especially in infants with a prominent thymus. [quizlet.com]

[…] artery, the right common carotid artery and the right subclavian artery; this variant is found in an estimated 7% of individuals. [13] Clinical significance [ edit ] The aortic [en.wikipedia.org]

Kyphoscoliosis

There are often a prominent pulmonary artery segment and lack of prominence of the aortic knob. [pubs.rsna.org]

Left-to-Right Cardiac Shunt

[…] pulmonary artery and aortic knob along upper left heart border ; increased pulmonary markings Cardiac catheterization and angiography : only necessary prior to repair or [amboss.com]

[…] pressure Color Doppler: demonstrates blood flow from the aorta into the pulmonary artery ECG : : normal in small PDA; left axis deviation due to LVH in large PDA Chest x-ray : prominent [amboss.com]

Congenital Absence of Ductus Arteriosus

[…] pulmonary artery and aortic knob along upper left heart border ; increased pulmonary markings Cardiac catheterization and angiography : only necessary prior to repair or [amboss.com]

The left border is elongated and flattened, with prominence of the main pulmonary artery, which is separated from the aortic knob by a radiolucent zone (Snoopy's sign). [7 [heartviews.org]

[…] pressure Color Doppler: demonstrates blood flow from the aorta into the pulmonary artery ECG : : normal in small PDA; left axis deviation due to LVH in large PDA Chest x-ray : prominent [amboss.com]

Acyanotic Congenital Heart Disease

[…] pulmonary artery and aortic knob along upper left heart border ; increased pulmonary markings Cardiac catheterization and angiography : only necessary prior to repair or [amboss.com]

[…] pressure Color Doppler: demonstrates blood flow from the aorta into the pulmonary artery ECG : : normal in small PDA; left axis deviation due to LVH in large PDA Chest x-ray : prominent [amboss.com]

Pericardial Anomaly

The left border is formed by the arch of the aorta (constituting a prominence known as the aortic knob, or knuckle), pulmonary trunk, left auricle, left ventricle, and extrapericardial [dartmouth.edu]

Right to Left Shunt

[…] pulmonary artery and aortic knob along upper left heart border ; increased pulmonary markings Cardiac catheterization and angiography : only necessary prior to repair or [amboss.com]

[…] pressure Color Doppler: demonstrates blood flow from the aorta into the pulmonary artery ECG : : normal in small PDA; left axis deviation due to LVH in large PDA Chest x-ray : prominent [amboss.com]

Congenital Pericardium Anomaly

The left border is elongated and flattened, with prominence of the main pulmonary artery, which is separated from the aortic knob by a radiolucent zone (Snoopy's sign). [7 [heartviews.org]

Mitral Annulus Calcification

Figure1 Chest radiograph showing calcification of the mitral annulus (see arrow), aortic knob and pleural calcification on the left side. [pulmonarychronicles.com]

Figure 2 Chest radiograph showing prominent pleural calcification of the left side (see arrow). [pulmonarychronicles.com]

Aortic Arch Interruption

Chest X-ray with prominent right cardiac border secondary to dilatation of the ascending aorta (double arrow) and absent aortic knob (arrow). Figure 2. [frontiersin.org]

Right Atrial Hypertrophy

The other reason the main pulmonary artery may be more than 15 mm from the tangent line is the left ventricle and/or aortic knob may enlarge and push the tangent line away [learningradiology.com]

Young females may normally have prominence of the MPA but rarely does the main pulmonary artery project beyond the tangent. 6. [learningradiology.com]

Cardiomegaly on Chest X-ray

The other reason the main pulmonary artery may be more than 15 mm from the tangent line is the left ventricle and/or aortic knob may enlarge and push the tangent line away [learningradiology.com]

Young females may normally have prominence of the MPA but rarely does the main pulmonary artery project beyond the tangent. 6. [learningradiology.com]

Persistent Fifth Aortic Arch

Although the aortic knob on chest roentgenogram would be left sided, this is not always evident, especially in infants with a prominent thymus. [quizlet.com]

Anomalous Origin of the Innominate Artery

Although the aortic knob on chest roentgenogram would be left sided, this is not always evident, especially in infants with a prominent thymus. [quizlet.com]

Multiple Types of Congenital Heart Defects 4

[…] pulmonary artery and aortic knob along upper left heart border ; increased pulmonary markings Cardiac catheterization and angiography : only necessary prior to repair or [amboss.com]

[…] pressure Color Doppler: demonstrates blood flow from the aorta into the pulmonary artery ECG : : normal in small PDA; left axis deviation due to LVH in large PDA Chest x-ray : prominent [amboss.com]