Which condition is a contraindication to cardiac catheterization?

Which condition is a contraindication to cardiac catheterization?

• A. Pregnancy
• B. Hypertension
• C. Renal failure
• D. Diabetes

Answer: (C)

The main concept here is the risk of contrast-induced nephropathy from the iodinated contrast used during cardiac catheterization. In someone with renal failure, the kidneys already have reduced function, so introducing contrast can trigger or worsen acute kidney injury, which can be irreversible. Because of this, renal failure is considered a contraindication to performing the procedure unless the potential diagnostic or therapeutic benefit clearly outweighs the risk and protective measures are planned (such as minimizing contrast volume and ensuring adequate hydration, and considering alternative imaging when possible). Pregnancy is a relative concern because radiation exposure to the fetus is a factor, so the procedure is typically avoided if there’s a nonurgent alternative, or performed only with strict precautions if it’s urgently needed. Hypertension and diabetes, while they increase the risk of contrast-related kidney injury, do not by themselves make the procedure inappropriate; they are risk modifiers rather than absolute barriers.

The main concept here is the risk of contrast-induced nephropathy from the iodinated contrast used during cardiac catheterization. In someone with renal failure, the kidneys already have reduced function, so introducing contrast can trigger or worsen acute kidney injury, which can be irreversible. Because of this, renal failure is considered a contraindication to performing the procedure unless the potential diagnostic or therapeutic benefit clearly outweighs the risk and protective measures are planned (such as minimizing contrast volume and ensuring adequate hydration, and considering alternative imaging when possible).

Pregnancy is a relative concern because radiation exposure to the fetus is a factor, so the procedure is typically avoided if there’s a nonurgent alternative, or performed only with strict precautions if it’s urgently needed. Hypertension and diabetes, while they increase the risk of contrast-related kidney injury, do not by themselves make the procedure inappropriate; they are risk modifiers rather than absolute barriers.