What causes steal phenomenon?
What causes steal phenomenon?
Subclavian steal syndrome develops due to a blockage in or narrowing of a subclavian artery. The most common cause is atherosclerosis. Other risk factors include large artery vasculitis and congenital heart irregularities. Without treatment, some causes of subclavian steal syndrome can lead to serious complications.
What is left subclavian artery stenosis?
Summary. Stenosis (narrowing) of the subclavian artery is most commonly caused by atherosclerosis, and it usually affects the left subclavian artery. It may be suspected if a large difference in blood pressure readings is found between the arms.
What is coronary steal phenomenon?
Coronary steal is the phenomenon where physiological or pharmacological vasodilation of a myocardial segment’s vasculature is associated with “steal” of blood from another myocardial segment, which is already significantly vasodilated due to the presence of a significant stenosis in a large epicardial artery.
What is vascular steal?
The presence of stenotic lesions in multiple arteries can lead to a condition called “vascular steal.” This occurs when dilation of one vascular network (e.g., during exercise or vasodilator therapy) “steals” blood flow from another region within the organ that is already maximally dilated because of the presence of …
How is subclavian steal syndrome treated?
Patients with burdensome symptoms and proximal subclavian artery occlusive disease can be successfully treated either surgically or percutaneously. Balloon angioplasty and stenting can be performed when stenting is unlikely to compromise the vertebral circulation.
What is coronary steal?
Which drugs cause coronary steal phenomenon?
Isoflurane was introduced for general clinical use in North America in 1981. Shortly thereafter, in 1983, a study suggested that the anesthetic was a potent coronary vasodilator that could cause coronary steal and myocardial ischemia in patients with coronary artery disease.
