A 65-year-old female patient is admitted to the coronary care unit with an acute ST-elevation myocardial infarction. She underwent successful PCI with stent placement to the left anterior descending artery. Continuous cardiac monitoring shows normal sinus rhythm with occasional premature ventricular contractions. Laboratory results show elevated troponin levels and mild hyponatremia. The patient has a history of hypertension and diabetes mellitus type 2.

The patient's acute STEMI status requires vigilant assessment for complications like cardiogenic shock, which is life-threatening and demands immediate intervention. Other options address supportive care but are lower priority in this high-risk scenario.

Core Nursing Explanation Key Concept Analysis: This question tests the nurse's ability to prioritize care for a patient with an acute ST-elevation myocardial infarction (STEMI). While the patient has undergone successful Percutaneous Coronary Intervention (PCI), the immediate post-procedure period is critical for monitoring for life-threatening complications. The core nursing principle here is Key Point! Assessing for and preventing deterioration takes precedence over routine or supportive care. The pathophysiology involves potential myocardial stunning, reperfusion injury, or ongoing ischemia that can lead to pump failure.

Answer Rationale: Option ④ is correct because Key Point! Cardiogenic shock is the most lethal complication of an acute MI, especially in the early hours. It occurs when more than 40% of the left ventricle is damaged, leading to profound hypotension and inadequate tissue perfusion. The nurse's primary role is continuous surveillance for early signs such as hypotension, tachycardia, cool clammy skin, decreased urine output, and altered mental status. Recognizing these signs and notifying the physician immediately is a critical, potentially life-saving intervention.

Distractor Analysis:

• Option ① (Morphine): While morphine is a standard medication for MI-related pain and anxiety, its administration requires careful assessment first. In the context of potential hemodynamic instability, morphine can cause Watch out for confusion! vasodilation and respiratory depression, which could worsen hypotension. Pain should be assessed, but the priority is ensuring the patient is not in shock before administering medications that can lower blood pressure.
• Option ② (Increase O2): Oxygen therapy is standard for MI patients with hypoxia (SpO2 < 90%). However, the scenario does not indicate hypoxia or respiratory distress. Watch out for confusion! Unnecessary high-flow oxygen in a normoxic patient is not evidence-based and is a lower priority than assessing for shock.
• Option ③ (Deep breathing): Anxiety management is important, but it is a supportive, non-urgent intervention. Encouraging deep breathing exercises does not address the immediate risk of a life-threatening complication.

Related Concepts: Post-PCI care includes monitoring the access site for bleeding or hematoma, assessing distal pulses, and ensuring adequate hydration to prevent contrast-induced nephropathy. The mild hyponatremia noted in the labs should be monitored but is not the acute priority. The history of hypertension and diabetes are risk factors that make the patient more susceptible to complications.

Concept Summary

Concept	Key Takeaway
STEMI	Complete coronary artery occlusion. Time is muscle; reperfusion (PCI/thrombolytics) is urgent.
Cardiogenic Shock	Life-threatening pump failure. Priority signs: hypotension, tachycardia, cool/clammy skin, oliguria.
Nursing Priority (ABCs)	Airway, Breathing, Circulation. Assessing for shock is a "Circulation" priority.
Post-PCI Monitoring	Vigilance for re-occlusion, bleeding at access site, arrhythmias, and pump failure.

Side-by-Side Comparison!

Complication	Key Signs & Symptoms	Nursing Priority Action
Cardiogenic Shock	Hypotension (SBP 임상 시나리오 Nursing Clinical Practice Guide Clinical Scenario: You are the nurse in the CCU. Your patient, Mrs. Johnson, 2 hours post-PCI for an LAD STEMI, becomes increasingly restless. Her blood pressure has trended down from 130/80 to 96/58 over the last hour. Her skin is cool and diaphoretic, and her urinary output for the last hour was only 15 mL. Nursing Intervention Strategy: Immediate Assessment (Circulation!): Check BP manually for accuracy. Assess heart rate, rhythm, and quality of peripheral pulses. Auscultate heart and lung sounds (listen for S3 gallop or crackles). Check capillary refill (>3 seconds is delayed). Notify & Collaborate: Using SBAR (Situation, Background, Assessment, Recommendation), immediately notify the physician or rapid response team. "S: Mrs. Johnson is showing signs of possible cardiogenic shock. B: She is 2 hours post-PCI for an LAD STEMI. A: BP 96/58, HR 118, cool/clammy skin, urine output 15mL/hr. R: I recommend stat labs and preparing for possible vasopressor support." Simultaneous Actions: Ensure two large-bore IV lines are patent. Administer oxygen if SpO2 is low. Position the patient flat or in Trendelenburg if not contraindicated (to improve venous return). Do not leave the patient unattended. Patient Safety and Precautions: Medication Caution: Hold any antihypertensives or medications that can lower BP (like nitrates or morphine) until the patient is stabilized and shock is ruled out. Monitoring: Continuous cardiac and hemodynamic monitoring (arterial line, central venous pressure if available) is essential. Strict intake and output (I&O) monitoring. Access Site: Continue to monitor the PCI access site (usually femoral or radial) for bleeding, as the patient is on potent antiplatelets. Nursing Procedure & Medication Flow For Suspected Cardiogenic Shock: STAT 12-lead ECG to rule out re-infarction. Draw stat labs: Cardiac enzymes (troponin), BNP, electrolytes, ABG (arterial blood gas), lactate (elevated lactate indicates poor tissue perfusion). Prepare for vasoactive IV drips as ordered (e.g., Dopamine, Norepinephrine, Dobutamine). Use an infusion pump and double-check dosing (mcg/kg/min). Titrate based on BP and perfusion parameters. Administer IV fluids cautiously! In cardiogenic shock, the problem is pump failure, not volume loss. A small fluid challenge may be ordered, but excessive fluids can worsen pulmonary edema. A Word from Your Senior Nurse "Nursing in the CCU is about being a detective and a first responder. That 'gut feeling' when a patient just doesn't look right is often your clinical judgment picking up on subtle cues of deterioration. For Mrs. Johnson, her restlessness and cool skin were more telling than the monitor numbers alone. On the NCLEX and in practice, never underestimate the power of a thorough, focused assessment. It's the foundation of everything we do. Prioritizing the detection of cardiogenic shock isn't just about passing a test—it's about being the one who catches the crisis before it becomes a catastrophe. You've got this!" 핵심 개념 ST-Elevation Myocardial Infarction — A type of heart attack caused by a complete blockage of a coronary artery, leading to full-thickness damage of the heart muscle. Characterized by ST-segment elevation on an ECG. Percutaneous Coronary Intervention — A non-surgical procedure used to treat coronary artery blockages. A catheter with a balloon and/or stent is threaded to the blocked artery to open it and restore blood flow. Cardiogenic Shock — A life-threatening condition where the heart is severely damaged and cannot pump enough blood to meet the body's needs. It is characterized by hypotension, tissue hypoperfusion, and organ failure. Troponin — A protein found in heart muscle. It is released into the bloodstream when the heart is damaged, making it a highly sensitive and specific biomarker for diagnosing a myocardial infarction. Hyponatremia — A low serum sodium level ( 마이메르시로 국가고시 완벽 대비 기출문제와 상세 해설을 무료로. 내 약점을 분석하고 진도를 관리하며 더 똑똑하게 공부하세요. 무료로 시작하기 App Store Google Play 학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요.