# Stage 6 — Evaluate outcomes. Review the post-PCI trend and select the best interpretation and next plan.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=566995&lang=en  
> language: en  
> subject: System-Specific Assessments  
> category: ROR

## Question

Stage 6 — Evaluate outcomes. Review the post-PCI trend and select the best interpretation and next plan.

| Time | Data |
| --- | --- |
| ED arrival | Pain 9/10; BP 152/94; HR 102; SpO2 93 percent on room air; inferior ST elevation 2 to 3 mm |
| Before PCI | V4R ST elevation 1 mm; BP 138/86; HR 96; lungs clear; catheterization laboratory already activated |
| PCI result | Proximal RCA 100 percent occluded; drug-eluting stent placed; TIMI grade 3 flow restored |
| 30 minutes after PCI | Pain 1/10; inferior ST elevation decreased by more than 50 percent; BP 118/72; HR 54 sinus rhythm; PR 220 ms; alert without dizziness; radial site soft and dry; troponin continues to rise |

Q1. How should the nurse interpret the response to PCI?

Reperfusion is successful based on TIMI 3 flow, pain relief, and ST resolution despite the ongoing troponin rise
PCI has failed because any post-procedure troponin increase proves persistent coronary occlusion
The response is indeterminate until troponin returns to the reference range

Q2. What is the best next plan?

Continue rhythm, AV-conduction, hemodynamic, recurrent-ischemia, bleeding, and access-site monitoring; continue prescribed DAPT and secondary prevention
Give atropine immediately for asymptomatic sinus bradycardia and mild PR prolongation despite stable perfusion
Stop the P2Y12 inhibitor because pain and ST elevation improved after stent placement
Start routine oxygen solely because the arrival saturation was 93 percent even though the current saturation is 95 percent

## Explanation

Trend interpretation
Restored TIMI grade 3 flow, marked pain relief, and more than 50 percent ST-segment resolution support successful reperfusion. A post-reperfusion troponin rise does not by itself indicate failed PCI. Continue post-PCI ischemia, rhythm, AV-conduction, hemodynamic, bleeding, and access-site monitoring and continue prescribed dual antiplatelet and secondary-prevention care.

## In-depth explanation

Step 1 — Integrate the response
The artery is open with TIMI 3 flow, pain is nearly resolved, and the ST elevation has fallen substantially. These findings together support effective reperfusion.

Step 2 — Interpret biomarkers in time
Troponin can continue rising after reperfusion because circulating concentrations lag behind the clinical event. Recurrent symptoms, renewed ST elevation, unstable hemodynamics, or impaired angiographic flow would be more concerning for failure or reocclusion.

Step 3 — Watch inferior-MI complications
Asymptomatic sinus bradycardia with mild PR prolongation requires continued rhythm and AV-conduction assessment. Escalate if bradycardia becomes symptomatic, hypotension develops, or higher-grade block appears.

Step 4 — Protect the stent and recovery
Continue prescribed dual antiplatelet therapy, access-site and bleeding surveillance, secondary prevention, smoking-cessation support, and cardiac-rehabilitation planning.

NCLEX rule
Evaluate a trend by combining symptoms, ECG, perfusion, rhythm, and procedure findings rather than isolating one delayed laboratory value.

## Clinical scenario

Scenario (Stage 6 — Evaluate outcomes)
A proximal RCA occlusion was stented with TIMI grade 3 flow. The nurse evaluates early reperfusion and post-PCI risks.

Clinical judgment target
Recognize successful reperfusion while continuing surveillance for conduction, ischemic, and bleeding complications.

## Key concepts

- **TIMI grade 3 flow** — Normal antegrade coronary flow beyond the treated lesion after reperfusion.
- **ST-segment resolution** — A substantial fall in ST elevation after treatment that supports restoration of myocardial perfusion when interpreted with the clinical course.
- **AV-conduction monitoring** — Surveillance for PR prolongation and heart block, which can occur with inferior infarction involving the AV nodal blood supply.

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