ASTROMEDICS Health Library · Updated 28 October 2026
General patient education, not a diagnosis or an individual treatment plan. A qualified clinician should assess your symptoms and advise you.
Why the procedure is recommended
An unfamiliar procedure can feel less overwhelming when you know its purpose and what preparation involves. Cardiac catheterisation may be recommended to investigate heart problems or as part of treatment.
Cardiac catheterisation involves a thin tube passed through a blood vessel. Coronary angiography uses contrast and X-ray images to examine the arteries supplying the heart.
The reason for the test, preparation and recovery depend on the procedure and your health. Discuss benefits, risks and alternatives with the care team.
Prepare with your own care team
Bring a current medicine list and tell staff about allergies, kidney problems, possible pregnancy and previous contrast reactions. Follow only the preparation instructions given for you.
Preparing for the next step
Ask which catheter procedure is planned and whether contrast dye or sedation will be used. Tell the team about kidney disease, diabetes, bleeding problems and earlier reactions to contrast. Confirm transport arrangements and written instructions for your return home.
Questions for your consultation
- What will this procedure tell us or treat?
- Which medicines and preparation instructions apply to me?