irradiant en dorsal

[scive]

Can someone please help with the translation of this sentence? It is from a doctor's report and so explains the short-hand style of the sentences. It is the section in bold which is causing me a problem:

"Ce jour persistent des douleurs thoraciques même au repos, sein gauche bras gauche irradiant en dorsal, céphalées, pertes de mémoire ... etc"

This is my attempt:

"Pains in the thorax still persist even at rest, left breast, left arm and back pain, headaches, memory losses..."

 

[Quaeitur]

left breast, left arm, radiating all over the back ?

 

[scive]

left breast, left arm, radiating all over the back ?

But surely 'irradiant' refers to 'painful' or 'in pain'?

 

[Quaeitur]

It means that the pain is radiating from the left side of the thorax (the left breast, the left arm) and all over the back (dorsal).