ECG Interpretation Module

ST-Elevation Myocardial Infarction (STEMI)

20-25 minutes

Intermediate Level

4 Questions

Case Presentation

Chief Complaint

You are called to a 58-year-old male experiencing severe chest pain that started 45 minutes ago while mowing his lawn. He describes the pain as "crushing" and "like an elephant sitting on my chest." The pain radiates to his left arm and jaw.

Patient Information

Age: 58 years

Gender: male

PMH: Type 2 Diabetes, Hypertension, 30 pack-year smoking history

Medications: Metformin 500mg BID, Lisinopril 10mg daily

Vital Signs

BP: 156/92 mmHg

HR: 102 bpm

RR: 22/min

SpO2: 94% on room air

Pain: 9/10

Glucose: 186 mg/dL

12-Lead ECG Findings

Rhythm: Sinus Tachycardia

ST Elevation: 3-4mm in leads II, III, aVF

Reciprocal Changes: ST depression in I, aVL

Q Waves: Not yet developed

T Waves: Hyperacute in inferior leads

Question 1 of 4

10 points

Based on the 12-lead ECG showing ST elevation in leads II, III, and aVF, which wall of the heart is affected?

STEMI Timeline

0-10 min

ECG, Aspirin, IV access

10-30 min

Transport, STEMI alert

30-90 min

Door-to-balloon time

STEMI Interventions

Aspirin 324mg chewed

First-line treatment for all ACS patients

12-Lead ECG

Essential for STEMI identification and cath lab activation

IV Access

Required for medication administration and potential complications

Nitroglycerin 0.4mg SL

Reduces preload and myocardial oxygen demand

ECG Lead Groups

Inferior:II, III, aVF

Anterior:V1-V4

Lateral:I, aVL, V5-V6

Septal:V1-V2