Q: Diagnosis and management A: ECG Analysis Patient: Mr. Aminul Islam, 25M HR: 90 bpm Date: April 02, 2026 ECG Findings Parameter Value ------ Heart Rate 90 bpm PR Interval 0.14 sec normal QRS Duration 0.076 sec normal QT/QTc 0.196 / 0.241 sec P-QRS-T Axis 69 / -29 / 45° Critical findings from the tracing: - Massive ST elevation in the precordial leads: V1 1.81 mm, V2 4.96 mm, V3 4.96 mm, V4 3.29 mm, V5 2.03 mm, V6 1.86 mm - ST elevation in limb leads: Lead I 0.81 mm, Lead II 1.39 mm, aVL 0.13 mm, aVF 0.90 mm - Reciprocal changes: aVR shows ST depression -1.06 mm, with inferior lead involvement suggesting extensive disease - Tombstone morphology of ST segments visible in mid-precordial leads --- Diagnosis Extensive Anterior STEMI ST-Elevation Myocardial Infarction The ST elevation from V1 through V6, involving the lateral leads I, II, aVF, is consistent with proximal Left Anterior Descending LAD artery occlusion — sometimes called a "widowmaker" MI. The involvement extending to the lateral and inferior leads suggests either a wrap-around LAD or concomitant right coronary territory involvement, making this an extensive anterior MI. The deep ST depression in aVR −1.06 mm further supports proximal LAD or left main occlusion. !Anterior STEMI ECG showing ST elevation V2-V6 with tombstoning morphologyhttps://cdn.orris.care/cdssimages/pmcclinicalVQA27009136f97045757d0a4f2a14798ae92d980f4a7ba37877618134e80f90f890.jpg Classic anterior STEMI pattern — note tombstoning ST elevation in precordial leads with reciprocal changes comparable pattern to the submitted ECG --- Management This is a time-critical emergency — "Door-to-balloon time" target: ≤90 minutes Immediate First 10 minutes 1. Activate the cardiac catheterization lab immediately — call STEMI alert 2. IV access × 2, continuous cardiac monitoring, defibrillator at bedside 3. 12-lead ECG confirmation and serial ECGs 4. Oxygen — if SpO₂ 90% only avoid hyperoxia 5. Aspirin 300 mg loading dose chewed 6. P2Y12 inhibitor loading: - Ticagrelor 180 mg PO preferred, or - Clopidogrel 600 mg PO if ticagrelor unavailable 7. Sublingual nitroglycerine — if BP permits avoid if hypotensive 8. Morphine 2–4 mg IV for pain relief use cautiously — may delay P2Y12 absorption 9. Anticoagulation: Unfractionated heparin 60 U/kg IV bolus max 4000 U 10. Labs: Troponin, CBC, BMP, coagulation profile, blood type & cross Reperfusion Strategy Harrison's, p. 7584 Strategy Preferred When ------ Primary PCI 1st choice PCI-capable center available within 90 min of first medical contact Fibrinolysis fallback PCI not available within 120 min; symptom onset 12h; no contraindications Primary PCI is the gold standard — superior to thrombolysis in opening occluded arteries with better short- and long-term outcomes Harrison's, p. 7584. If fibrinolysis is chosen no PCI available: - Alteplase tPA: 15 mg IV bolus, then 0.75 mg/kg over 30 min, then 0.5 mg/kg over 60 min - Streptokinase: 1.5 million units over 60 min - Absolute contraindications: prior intracranial hemorrhage, active bleeding, recent surgery, severe uncontrolled hypertension ICU/CCU Monitoring - Continuous telemetry — this young patient with proximal LAD occlusion is at high risk for: - Ventricular fibrillation / VT peak risk first 24–48 h - Complete heart block - Acute heart failure / cardiogenic shock - Mechanical complications: free wall rupture, VSD, acute MR Post-Reperfusion Medical Therapy Drug Dose Indication --------- Aspirin 75–100 mg daily lifelong Antiplatelet Ticagrelor 90 mg BD × 12 months Antiplatelet DAPT Beta-blocker metoprolol 25–50 mg BD Reduce remodeling, arrhythmia ACE inhibitor ramipril 2.5–10 mg daily Reduce LV remodeling Statin atorvastatin 40–80 mg daily Plaque stabilization Aldosterone antagonist If EF ≤40% + symptoms Eplerenone/spironolactone Special Consideration — Young Patient 25 years old A STEMI at age 25 is uncommon and warrants investigation for: - Cocaine/stimulant use coronary spasm or thrombosis - Hypercoagulable state antiphospholipid syndrome, Factor V Leiden - Familial hypercholesterolemia - Spontaneous coronary artery dissection SCAD - Coronary artery anomaly - Kawasaki disease sequelae Screen post-stabilization with lipid panel, thrombophilia workup, and toxicology if indicated. --- ⚠️ This ECG represents a life-threatening emergency requiring immediate activation of the STEMI protocol and urgent reperfusion.
