In case of coarctation of aoa which of the following is not involved in collateral formation?
The coarctation may be:Preductal- where the narrowing is proximal to the ductus aeriosus or ligamentum aeriosum orPostductal- where the narrowing is distal to the ductus aeriosus or ligament= aeriosum.Collateral circulation connects the proximal and the distal aspects of the vessels over time. This collateral circulation will develop mainly from the
Veebral aery
Posterior intercostal aery
Axillary aery
Subscapular aery