Minneapolis ? Former President Ford underwent his second heart procedure in a week at the Mayo Clinic when stents were placed into two of his coronary arteries to increase blood flow, his spokeswoman said Friday.

The angioplasty procedure on the 93-year-old Ford was successful and he was resting comfortably in his room at the hospital in Rochester, spokeswoman Penny Circle said in a statement.

On Monday, doctors at the clinic had fitted Ford with an implantable cardiac pacemaker to regulate his heartbeat.

Mayo Clinic spokesman John Murphy confirmed the procedure, but would not comment further.