---

🫀 SITUATIONAL TASK No. 2 — PROFESSOR-LEVEL CASE ANALYSIS

---

CASE SUMMARY (Clinical Reconstruction)

• Nocturnal onset of pressing chest pain, weakness, severe dyspnea → called 911
• Orthopnea, inability to lie flat, palpitations, sensation of chest compression
• White frothy sputum with cough
• Facial cyanosis, diaphoresis, noisy/gurgling breathing, crackles audible at a distance
• RR 28/min, HR 100/min, BP 150/90 mmHg
• Coarse crackles bilaterally, dry wheezes in upper fields
• Liver 3 cm below costal margin (hepatomegaly)
• Troponin I 27.5 ng/mL (massively elevated), MB-CK 154 U/L (elevated)
• ECG shows changes consistent with acute infarction (to be analyzed below)

---

🔴 PRELIMINARY (PRIMARY) DIAGNOSIS

Acute Myocardial Infarction (Repeated / Recurrent) — Q-wave (STEMI-pattern), anterior or anterolateral territory

Universal Definition of MI (4th Universal Definition, ESC/ACC/AHA):

1. ✅ Rise and/or fall of cardiac troponin with at least one value above the 99th percentile URL (Troponin I 27.5 ng/mL — far exceeds this threshold)
2. ✅ Plus at least one of:
   • Symptoms of acute myocardial ischemia (pressing chest pain ✅)
   • New ischemic ECG changes ✅
   • Development of pathological Q waves ✅
   • New regional wall motion abnormality on imaging
   • Thrombus identified on angiography

---

🟠 ADDITIONAL DIAGNOSIS (COMPLICATION OF PRIMARY DIAGNOSIS)

Acute Left Ventricular Failure with Cardiogenic Pulmonary Edema — Killip Class III

Killip Classification Applied to This Patient:

---

Additional Complication: Acute Congestive Hepatopathy (Right-sided congestion)

• Liver protruding 3 cm below costal margin in a previously non-cirrhotic patient
• In the context of acute MI + pulmonary edema, this reflects acute right heart congestion (backup from left-sided failure elevating PA pressures → RV overload)

---

📋 ECG ANALYSIS

• ST elevation in leads V1–V4 (anterior STEMI) or V4–V6, I, aVL (anterolateral)
• Possible pathological Q waves (evidence of prior infarction/current transmural injury)
• Reciprocal ST depression in inferior leads (II, III, aVF)
• Sinus tachycardia HR ~100/min (as confirmed clinically)

---

🔬 METHODS OF INVESTIGATION

For Acute MI:

For Acute Heart Failure / Pulmonary Edema:

---

💊 TREATMENT

EMERGENCY MANAGEMENT (First 30–60 minutes = "Golden Hour")

A. Immediate Stabilization:

1. Positioning: Sitting upright (reduces preload, improves lung compliance)
2. O₂ therapy: High-flow O₂ via face mask to maintain SpO₂ ≥ 94%
3. IV access × 2 large-bore lines; continuous cardiac monitoring + pulse oximetry
4. Non-invasive positive pressure ventilation (CPAP/BiPAP) — first-line for cardiogenic pulmonary edema; recruits alveoli, reduces work of breathing, reduces preload

B. Reperfusion Therapy for STEMI (Primary PCI preferred):

• Primary PCI (Percutaneous Coronary Intervention): Target door-to-balloon time < 90 minutes
  • Preferred in experienced centers
  • Restores coronary flow, limits infarct size, reduces mortality
• Thrombolysis (if PCI unavailable within 120 min):
  • Alteplase (tPA) 100 mg IV or Streptokinase
  • Contraindicated if active bleeding, recent surgery, prior hemorrhagic stroke

C. Antiplatelet / Anticoagulation:

D. For Pulmonary Edema (Acute LV Failure):

E. Adjunctive Cardiac Medications:

F. Management of Complications:

• Hepatic congestion: Responds to treatment of HF (diuretics, afterload reduction)
• Arrhythmia monitoring: Continuous ECG telemetry (risk of VT/VF in acute MI)
• Defibrillator readiness at bedside

G. ICU Monitoring:

• Continuous ECG, SpO₂, BP (arterial line ideal)
• Hourly urine output
• Repeat ECG after reperfusion (ST resolution ≥50% = successful reperfusion)
• Repeat troponin at 3 hours post-presentation

---

🎓 PROFESSOR'S SYNTHESIS

"This is a 48-year-old male with recurrent acute myocardial infarction superimposed on a previously infarcted myocardium — a so-called 'infarction on top of a scar.' The prior MI one year ago had already compromised LV systolic function to some degree. The new occlusion pushed him beyond the threshold of compensated LV dysfunction into overt acute left ventricular failure with cardiogenic pulmonary edema.

The clinical picture is textbook Killip Class III — bilateral coarse crackles in ALL lung fields, white frothy sputum (alveolar flooding), orthopnea, cyanosis. Note that his BP is preserved at 150/90 — this is actually a catecholamine-mediated response to acute ischemia. He is NOT in cardiogenic shock (which would require SBP < 90 with end-organ hypoperfusion). However, the Killip III classification carries ~38% in-hospital mortality if untreated aggressively.

The hepatomegaly — liver 3 cm below the costal margin — is a critical finding often overlooked by students. It signals early right ventricular involvement from elevated pulmonary artery pressures secondary to the left-sided failure. This is biventricular failure in evolution.

The biochemistry is confirmatory. Troponin I at 27.5 ng/mL is approximately 600 times the upper limit of normal — this represents massive myocardial necrosis. MB-CK at 154 U/L confirms active ongoing myocardial cell death. These enzymes do not lie.

Management priorities: (1) Stabilize the respiratory failure NOW — CPAP/BiPAP, high-flow O₂, IV furosemide, IV nitrates; (2) Open the culprit artery as fast as possible — call the cath lab immediately, primary PCI is the priority; (3) Load him on dual antiplatelet therapy and anticoagulation; (4) Do NOT give beta-blockers in the acute pulmonary edema phase — you will kill him by dropping his contractility further. Wait until he is euvolemic and breathing comfortably.

The sequence of diagnosis here is important for the examiner: the PRIMARY diagnosis drives everything — Acute MI. The pulmonary edema is not an independent pathology; it is a COMPLICATION of the massive ischemic insult on an already damaged LV. This distinction matters for both prognosis and targeted therapy."

---