I will repeat once again about hypoplasia (thin vessels) of blood vessels (hypoplasia of vertebral arteries, hypoplasia of transverse venous sinuses, and so on. Based on the laws of hydrodynamics and biomechanics of vessels. When there is some compression of the vessel, the blood flow decreases and over time the vessel becomes thinner.
For example, hypoplasmic transverse venous sinus. One of the main causes of hypoplasia is a narrow jugular opening (foramen) in the skull. And installing a stent in the transverse venous sinus will only give a slight improvement in blood flow. Because the jugular foramen (local resistance) remains unchanged, which affects the blood flow. To solve the problem completely, you need to enlarge the ugular foramen. (a narrow jugular foramen may be congenital (from birth), due to injuries to the skull or diseases of the mastoid process ). After solving the problem with the jugular foramen, you can perform a balonoplasty without a stent, or wait for the transverse venous sinus to expand on its own over time when the jugular foramen is large.
It’s the same with the vertebral arteries. The main cause of their hypoplasia (thinning) is local stenosis (partial). These are usually strong bends at the mouth of the vertebral artery, or compression by some structures.
Also, as far as I know, those who have a stent installed must constantly take special medications to protect against blood clots (antiplatelet therapy). Otherwise, blood clots may appear, which may also block your narrow jugular foramen or the sinus itself.
The stent is a mesh, and quite often this wall can be closed by blood clots and then calcification forms (Calcification of the stent begins with the wall of the stent, especially if it is metal). Therefore, it is necessary to take medications against blood clots, but the scheme of such therapy is prescribed and selected by a doctor based on blood tests.
Ask your doctors if you have calcification of the stent wall or not (this is one of the possible causes of the deterioration, that you have become worse)
There is also good news. Your jugular foramen is on the left, of normal size - about 5 x 5 mm.
It would be good to see a CT scan before installing the stent to see if the jugular foramen has expanded.
A stent can also innervate nerves before entering the jugular foramen.
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