Although coronary angioplasty is generally a safe procedure, there is some risk, including:
A heart attack
The need for emergency coronary artery bypass surgery
Puncture of a blood vessel or the heart
Bleeding, a blood clot or an infection at the catheter insertion site
A blocked blood vessel in the arm or leg where the catheter was inserted
An allergic reaction to the X-ray dye
Because some of these problems may be life threatening, coronary angioplasty should always be done in a hospital that has the necessary equipment and personnel to deal with any complications immediately.