Greek "angos"

I'm about to have angioplasty for my angina -- two words almost
next to each other in the English dictionary, but which I was
surprised to find are quite unrelated. I'm comfortable with the
word "angina" (the actuality isn't too comfortable), ultimately from
I.-E. "angh" painful constriction, related to English "anger",
"anxiety", and German "Angst". "Angio-" blood vessel, is from the
Greek "angeion" used post-classically for quite a variety of
hollow body parts, a diminutive of "angos" vessel, used by
Homer for kitchenware. But the references I have handy go no
further. Is there an I.-E. etymology? Or was the word from a
pre-Hellenic culture? Any information appreciated.
Dan Milton