cardioperfusion

The story

1. Proto-Indo-European*ḱerd-
2. Proto-Indo-European*ḱḗr
3. Proto-Indo-European*ḱr̥díyeh₂
4. Proto-Hellenic*kərdíyā
5. Ancient Greekκαρδία (kardía)
6. Englishcardio-
7. Proto-Indo-European*per-
8. Proto-Italic*peri-
9. Latinper-
10. Proto-Indo-European*ǵʰew-
11. Proto-Indo-European*ǵʰewd-
12. Proto-Indo-European*ǵʰunédti
13. Proto-Italic*hundō
14. Latinfundō
15. Latinperfundō
16. Latinperfūsiō
17. Middle Frenchperfusion
18. Englishperfusion
19. English todaycardioperfusion

From cardio- + perfusion.