Moyamoya disease is a rare blood vessel (vascular) disorder in which a ring of blood vessels at the base of your brain (the circle of Willis) and the uppermost (distal) segments of the arteries supplying the brain progressively narrow, causing blood flow to your brain to become reduced.ppointments at Mayo Clinic Mayo Clinic offers appointments in Arizona, Florida and Minnesota and at Mayo Clinic Health System locations.
Antithrombotic An antithrombotic agent is a drug that reduces the formation of blood clots ( thrombi). Antithrombotics can be used therapeutically for prevention ( primary prevention, secondary prevention) or treatment of a dangerous blood clot (acute thrombus).
Antistreptolysin O (ASO) is an antibody targeted against streptolysin O, a toxic enzyme produced by group A Streptococcus bacteria. ASO and anti-DNase B are the most common of several antibodies that are produced by the body's immune system in response to a strep infection with group A Streptococcus. This test measures the amount of ASO in the blood. Group A Streptococcus (Streptococcus pyogenes) is the bacterium responsible for causing strep throat and a variety of other infections, including skin infections (pyoderma, impetigo, cellulitis).