A 58-year-old man from rural Maharashtra presents to the district hospital with acute onset crushing chest pain radiating to the left arm for 3 hours. He is diaphoretic and anxious. Blood pressure is 95/60 mmHg, heart rate 110/min. ECG shows ST elevation in leads II, III, aVF with reciprocal ST depression in I, aVL. Troponin I is 0.8 ng/mL (normal <0.04). The nearest PCI-capable center is 180 km away with an estimated door-to-balloon time of 240 minutes. What is the most appropriate immediate management?

Explanation

## Clinical Scenario Analysis This is an **inferior wall STEMI** (ST elevation in II, III, aVF with reciprocal changes) presenting within the therapeutic window (3 hours) in a resource-limited setting with a door-to-balloon time of 240 minutes (4 hours). ## Rationale for Thrombolysis **Key Point:** When door-to-balloon time exceeds 120 minutes in a STEMI patient within 12 hours of symptom onset, thrombolysis is the preferred reperfusion strategy over delayed PCI. **High-Yield:** The 2019 ESC Guidelines and Indian ACC guidelines recommend: - Primary PCI: door-to-balloon time ≤120 minutes - Thrombolysis: if PCI-capable center >120 minutes away AND symptom onset <12 hours - Fibrinolytic of choice in India: streptokinase (cost-effective) or tenecteplase (faster, more fibrin-specific) **Clinical Pearl:** In this case, door-to-balloon time is 240 minutes, making thrombolysis superior to delayed PCI. Streptokinase is appropriate for this patient given the rural setting and cost considerations. ## Dual Antiplatelet Therapy **Key Point:** All STEMI patients require dual antiplatelet therapy (DAPT): - Aspirin 325 mg loading dose (irreversible COX inhibitor) - P2Y12 inhibitor: clopidogrel 600 mg (loading) or prasugrel 60 mg or ticagrelor 180 mg ## Why This Option is Correct 1. **Aspirin 325 mg** — standard loading dose for acute coronary syndrome 2. **Clopidogrel 600 mg** — P2Y12 inhibitor for DAPT; prasugrel/ticagrelor are alternatives but clopidogrel is widely available in rural settings 3. **Streptokinase 1.5 MU IV over 60 minutes** — fibrinolytic agent of choice given: - Door-to-balloon time 240 min (>120 min threshold) - Symptom onset 3 hours (<12 hour window) - Cost-effective in Indian healthcare setting - Proven mortality benefit in STEMI ## Adjunctive Therapy (Not in Options but Important) - Unfractionated heparin or LMWH should be added during thrombolysis - Beta-blocker (if no contraindication) — reduces reinfarction and arrhythmia - ACE inhibitor — post-MI cardioprotection - Statin — high-intensity [cite:Harrison 21e Ch 297]