**Core Concept**
The patient is presenting with signs of acute myocardial infarction (AMI) and has undergone thrombolysis, but the condition is not improving. This scenario highlights the importance of assessing the patient's response to thrombolysis and considering alternative treatment options.

**Why the Correct Answer is Right**
Thrombolysis is a time-sensitive treatment for AMI, and its effectiveness depends on the reperfusion of the occluded coronary artery. In this case, despite thrombolysis, the patient's condition is not improving, suggesting that the occlusion may not have been successfully cleared. The best course of action would be to proceed with primary percutaneous coronary intervention (PCI) to mechanically open the occluded artery. This approach is particularly beneficial in patients who have not responded to thrombolysis, as it offers a higher success rate in restoring blood flow to the affected area.

**Why Each Wrong Option is Incorrect**
**Option A:** Administering additional doses of thrombolytic agents is not the best approach, as it may increase the risk of bleeding without providing additional benefits.

**Option B:** Continuing to monitor the patient's condition without intervening may lead to further deterioration and increased mortality.

**Option C:** Performing coronary angiography without attempting primary PCI may delay necessary treatment and increase the risk of complications.

**Clinical Pearl / High-Yield Fact**
In the management of AMI, the American College of Cardiology (ACC) and American Heart Association (AHA) guidelines recommend primary PCI as the preferred reperfusion strategy in patients who present within 12 hours of symptom onset, particularly if the procedure can be performed within 90 minutes of first medical contact.

**Correct Answer: C. Primary percutaneous coronary intervention (PCI) should be considered to mechanically open the occluded artery.**