Rare serious risks: The complication rate for serious adverse events with a routine heart cath is on the order of 1/1000 to 1/10000. While rare, when they do happen they are quite serious, so you should always make the decision for a heart cath in conjunction with an experienced cardiologist. The most common issues are bruising at the cath site in the groin.
Answered 10/23/2017
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