This medical exhibit compares a coronary artery before angioplasty to a coronary artery after angioplasty. An orientation image of the heart and coronary vessels enlarges to show the fatty plaque deposits on the narrow interior of the coronary vessel. A third image shows the widened coronary artery immediately following the angioplasty procedure. Labels identify the coronary artery before angioplasty and the coronary artery after angioplasty.