Final answer:
After an emergency PTCA, a nurse should monitor the patient for bleeding at the catheter insertion site, which is a common post-procedural complication.
Step-by-step explanation:
A patient who has undergone an emergency Percutaneous Transluminal Coronary Angioplasty (PTCA) may be at risk for certain complications following the procedure. The nurse should monitor the patient for B) Bleeding at insertion site. This is a common post-procedure concern, as the insertion of the catheter can lead to bleeding. Other potential complications can also include vascular complications, such as hematoma or pseudoaneurysm at the catheter insertion site, and arrhythmias due to irritation of the cardiac tissue. It is also important to monitor for signs of re-occlusion of the coronary artery, which can be life-threatening.