What causes Kommerell diverticulum?
Kommerell diverticulum, a remnant of the left dorsal arch, is located where the left aberrant subclavian artery originates, causing external posterior compression of the esophagus. Patients often become symptomatic in later decades as the arteries become tortuous and aneurismal.
What is the most common aortic anomaly?
ARSA
ARSA is the most common anomaly associated with left aortic arch and is predominant in females (31). This anomaly results from involution of right arch between the right subclavian and the right common carotid artery along with regression of the right ductus arteriosus.
How rare is right aortic?
A right-sided aortic arch is a rare congenital defect of the aorta. It is present in 0.05% to 0.1% of radiology series and in 0.04%-0.1% of autopsy series [1, 2].
What is bulbous configuration?
Conclusion The bulbous configuration of the basilar artery tip dubbed the ‘basilar shield’ is a benign, normal variant of the posterior intracranial arterial circulation. Further studies may be necessary to determine if there is any association with cerebral aneurysms, but the variant itself is innocuous.
Is Kommerell diverticulum an aneurysm?
Kommerell’s diverticulum refers to the aneurysmal dilatation of the descending aorta at the origin of an aberrant subclavian artery, which is seen in both right- and left-sided aortic arches.
Who was Kommerell?
In 1934, Kommerell was appointed Chief of the Section of Radiology at the Charité University Clinic in Berlin. It was there, in 1936, that he wrote his well-known description 1 of an aortic diverticulum associated with an aberrant right subclavian artery.
Is left sided aortic arch normal?
A left aortic arch and aberrant right subclavian artery are often considered a normal variant and not a true vascular ring because of the typical absence of a right-sided ductus arteriosus or ligamentum arteriosum.
What does it mean when the aorta is on right side instead of left?
This means as the aorta leaves the heart, it arches to the left side. Right aortic arch occurs due to the persistence of the right branch with the regression of the left branch. This means that the aorta arches to the right side. It is most commonly a normal variant.
What is the point of a bulbous bow?
A bulbous bow is an extension of the hull just below the load waterline. The basic purpose is to create a low-pressure zone to reduce or eliminate the bow wave and reduce the resulting drag. Today the bulbous bow is a normal part of modern seagoing cargo ships.
Who invented bulbous bow?
David W. Taylor
The bulbous bow concept is credited to David W. Taylor, a naval architect who served as Chief Constructor of the United States Navy during the First World War and who used the concept (known as a bulbous forefoot) in his design of the USS Delaware, which entered service in 1910.