A small wire tube that is placed in an artery to help keep it open is called

A) a stent.
B) an electrocardiogram.
C) a pacemaker.
D) a coronary angioplasty.

A stent is a small wire mesh tube that is inserted into an artery during a procedure called coronary angioplasty. It helps to keep the artery open and prevent it from closing up again. An electrocardiogram (B) is a test that records the electrical activity of the heart. A pacemaker (C) is a small device that is implanted under the skin and helps to regulate the heart's rhythm. Coronary angioplasty (D) is a procedure that opens up blocked arteries using a small balloon, but it does not involve the placement of a stent.