Possible Complications

If you are planning to have cardiac catheterization, your doctor will review a list of possible complications. Complications may include:

  • Bleeding where the catheter goes in
  • Damage to an artery wall
  • Heart attack or abnormal heart beats known as arrhythmias
  • Allergic reaction to the x-ray dye
  • Blood clot formation
  • Infection

Some factors that may increase the risk of complications include:

  • Allergies to medications or x-ray dye
  • Obesity
  • Smoking
  • Bleeding problems
  • Increased age
  • Recent pneumonia
  • Recent heart attack
  • Diabetes
  • Kidney disease



This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.