Other nonrheumatic aortic valve disorders
Elastic arteries (conducting vessels) Small veins (capacitance vessels) Lymph node Capillaries (exchange vessels) Thoroughfare Precapillary sphincter channel Lymphatic ... Subclavian artery Subclavian artery Aortic arch Ascending aorta Coronary artery Thoracic aorta (above diaphragm) Renal artery Superficial palmar arch Radial artery
What are the causes of iliac artery aneurysm?
In subclavian stenosis, the artery is simply narrowed, leading to decreased blood flow beyond the area of blockage. When the subclavian blockage is severe, or if the artery is completely blocked, a condition called 'subclavian steal' can occur (Figure 4).
The subclavian arteries lie just below the clavicles, providing blood supply to the bilateral upper extremities with contributions to the head and neck. The right subclavian artery derives from the brachiocephalic trunk, while the left subclavian artery originates directly from the aortic arch.
Hemodynamically significant stenosis of the subclavian artery usually presents with symptoms of upper limb ischemia on the ipsilateral side as the lesion. It may also present as subclavian steal syndrome with symptoms of vertebro-basilar insufficiency as a result of retrograde flow in the ipsilateral vertebral artery.
The right subclavian artery is a branch of the brachiocephalic trunk and the left arises directly from the arch of the aorta. It lies posterior to the insertion of the scalenus anterior on the first rib. The subclavian vein runs parallel to the artery but in front of the scalenus anterior slightly at a lower level.
The main function of the subclavian artery is to supply blood to the upper limbs, thorax, neck, and brain....Subclavian artery: Regional approach and mnemonic.OriginLeft subclavian artery: Aortic arch Right subclavian artery: Brachiocephalic trunkSupplyUpper limbs, thorax, neck region, brain1 more row
The left subclavian artery arises directly from the aortic arch, about 1 cm distal to the origin of the left common carotid artery; the right subclavian artery in contrast arises from the brachiocephalic trunk, which is also where the right common carotid artery originates.
The left subclavian artery arises as the third and final great vessel from the aortic arch. The right subclavian artery arises from the innominate artery. The subclavian artery extends from its origin to the lateral border of the first rib.
All imaging tools can be used to detect subclavian stenosis and to observe reversal of flow from the vertebral artery. Carotid duplex ultrasound(US) is the most used and usually the first diagnostic test.
Upper extremity symptoms include arm claudication or muscle fatigue, rest pain, and finger necrosis. Neurologic issues include vertebrobasilar hypoperfusion including visual disturbances, syncope, ataxia, vertigo, dysphasia, dysarthria, and facial sensory deficits.
The aberrant right subclavian artery arises distal to the left subclavian artery, then courses obliquely behind the esophagus and into the right side of the mediastinum.