Cardiac catheterisation involves inserting a very thin tube into the right side of your heart.
Coronary angioplasty (or PCI) is a procedure to re-open a narrowed heart artery by inflating a tiny balloon in the narrowed segments.
Unlike your central nervous system, your peripheral nervous system is not protected by bone leaving it exposed to injury or toxins (poisons).
Thoracoscopic sympathectomy is a surgical procedure to correct hyperhidrosis (excessive sweating).