how did hector salamanca end up in a wheelchair

Hector Salamanca ends up in a wheelchair because his heart condition was worsened by a stroke caused when someone tampered with his medication. In the Better Call Saul/BREAKING BAD storyline, Nacho Varga swaps Hector’s nitroglycerin heart medication with fake pills. The plan is to destabilize Hector without directly killing him, and the medication swap triggers a stroke that leaves him paralyzed and confined to a wheelchair for the rest of the series. The reveal of Nacho’s role comes in later seasons, confirming that the wheelchair-bound Hector is a result of this coordination between Nacho (and others involved in their faction) rather than a random medical mishap. This backstory is depicted across Better Call Saul, with the key moment and its fallout explored in the final seasons.