It is true that arterial angioplasties and the insertion of stents into certain arteries are well established medical procedures. Arteries are muscular, thick-walled vessels that carry oxygenated blood under high pressure from the heart to the tissues.
Veins are thin-walled and collapse naturally when not filled with blood. Veins, in contrast to arterial structures, have lower intravascular blood pressure and thus it is more difficult to keep a vein open than an artery.
When a narrowed vein is treated by balloon venoplasty, it is like stretching an elastic. This is what creates a risk of elastic recoil, when the venoplasty balloon is removed from the vein, the vein returns to its original shape due to its elastic properties. This increases risk of restenosis in veins over arteries.
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