Search results
Results from the WOW.Com Content Network
Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation , the widening of blood vessels.
Women’s bodies go through many changes in menopause and the years leading up to it, known as perimenopause. This natural step in the aging process marks the end of the reproductive years. In ...
SNS stimulation causes a base level of vasoconstriction often referred to as basal neural tone, maintaining blood pressure. [2] Often vasodilation is simply the result of insufficient neurotransmitter to maintain basal neural tone, without the presence of a compound directly causing vasodilation.
Carbon monoxide is a toxic chemical that binds haemoglobin (molecule in the blood that carries oxygen) will decrease the amount of oxygen delivered to the cells and cause damage to other organs in the body. Damage to the arterial walls can cause vasoconstriction, allowing the arteries to narrow which can increase the risk of heart disease. [11]
Apart from treating underlying reversible causes (e.g., stopping or reducing certain medications, treating autoimmune causes), several measures can improve the symptoms of orthostatic hypotension and prevent episodes of syncope (fainting). Even small increases in the blood pressure may be sufficient to maintain blood flow to the brain on standing.
The main cause of endothelial dysfunction is impaired bioavailability of nitric oxide. [ 1 ] In addition to acting as a semipermeable membrane , the endothelium is responsible for maintaining vascular tone and regulating oxidative stress by releasing mediators, such as nitric oxide, prostacyclin and endothelin , and by controlling local ...
The 9 Most Common Questions Women Over 40 Ask Their Doctors, According To A Menopause Expert. Holiday traditions are wonderful, but they don’t have to be rigid. If certain rituals feel ...
In terms of the cause of aortic regurgitation, is often due to the aortic root dilation (annuloaortic ectasia), which is idiopathic in over 80% of cases, but otherwise may result from aging, syphilitic aortitis, osteogenesis imperfecta, aortic dissection, Behçet's disease, reactive arthritis and systemic hypertension. [1]