Structural defects: Defects in the framework of a blood vessel could cause narrowing. A large number of are acquired at start, and also the bring about is mysterious. Deficiency of blood and oxygen brings about upper body discomfort (exertional angina). Exertional angina typically subsides if the affected individual rests. In https://www.sgvascularctr.com/types-of-treatments-for-vascular-diseases/