So coronary angioplasty is when a stent is placed in blocked arteries. So the way the procedure works is you're brought into the cardiac cath lab, you're sedated by the sedation nurse and catheters are put in through the groin and taken all the way up to the heart. Contrast is then injected into the arteries of the heart where you can see clearly which arteries are blocked. Then when the block artery is identified, a stent can then be put across that blockage and be ballooned open so that you have blood flow through that blocked artery.
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