Pseudohypotension ( falsely low blood-pressure measurement ) may occur due to involvement of the brachiocephalic artery ( supplying the right arm ) or the left subclavian artery ( supplying the left arm ).
12.
The left subclavian artery is more deeply placed than the right in the first part of its course, and, as a rule, does not reach quite as high a level in the neck.
13.
From the street behind them, Chapman fired five shots from a . 38 special revolver, four of which hit Lennon in the back and left shoulder, puncturing the left lung and left subclavian artery.
14.
This compresses the esophagus and trachea because of the persistence of a ductal ligament ( from fetal circulation ) that may connect between the aorta on the front and the left subclavian artery posteriorly going to the left arm.
15.
Finally, the left subclavian artery comes off of the aortic arch to the left of the left common carotid artery and ascends, with the left common carotid, through the superior mediastinum and along the left side of the trachea.
16.
On the other hand, a coarctation occurring after the left subclavian artery will produce synchronous radial pulses, but radial-femoral delay will be present under palpation in either arm ( both arm pulses are normal compared to the delayed leg pulses ).
17.
The "'left subclavian artery "'and the "'right subclavian artery "', one on each side of the body form the internal thoracic artery, the vertebral artery, the thyrocervical trunk, and the costocervical trunk.
18.
One example in the treatment of thoracic aortic disease is revascularization of the left common carotid artery and / or the left subclavian artery from the innominate artery or the right common carotid artery to allow treatment of a thoracic aortic aneurysm that encroaches proximally into the aortic arch.
19.
In the above example, if the aortic dissection extended from proximal to the left subclavian artery takeoff to the mid descending aorta, the common iliac arteries would be perfused from the true lumen distal to the dissection but would be at risk for malperfusion due to occlusion of the true lumen of the aorta by the false lumen.
20.
Due to obstruction of the main branches of the aorta, including the left common carotid artery, the brachiocephalic artery, and the left subclavian artery, Takayasu's arteritis can present as pulseless upper extremities ( arms, hands, and wrists with weak or absent pulses on the physical examination ) which may be why it is also commonly referred to as the " pulseless disease . " Involvement of renal arteries may lead to a presentation of renovascular hypertension.
