In case of coarctation of aoa which of the following is not involved in collateral formation?
Veebral aery
Posterior intercostal aery
Axillary aery
Subscapular aery
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