After a percutaneous coronary intervention (ptca), hard and painful hiccups started. what could be the cause, and which doctor could help?

The cardiologist: Be sure no cardiac puncture or pericardial bleeding irritating the nerve to the diaphragm, or other cardiac irritation, or infarction which can rarely be related to hiccups.

Diaphragm: Hiccups are related to the diaphragm, the big muscle separating your lungs from the abdomen. I can't think of a reason why a PTCA would induce it since it should not have touched the nerves innervating the diaphragm. The internet is full of advice on how to stop hiccups but none has been scientifically proven. Try holding your breath and quickly drink 8 or more oz of water water