Women under the age of 55 have more complications after undergoing angioplasty, new research from the Yale schools of public health and medicine has found. Use of percutaneous coronary intervention (PCI), more commonly known as angioplasty, has grown rapidly since 1990 among both men (43 percent) and women (63 percent). The nonsurgical procedure involves running a catheter through an artery to an area of blockage in the heart. A balloon is then inflated to open the artery and improve blood flow. Oftentimes, a stent is also inserted to keep the artery open.