Ace Your First Aid for the USMLE Step 1 (2021) Classes and Exams with Picmonic: #1 Visual Mnemonic Study Tool for Physician Assistant (PA) Students
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First Aid for the USMLE Step 1 (2021) | Physician Assistant (PA) School Study Aid
Myocardial Infarction Diagnosis
- Diagnosis
- 12 Lead ECG
- ST Elevation
- Q Wave
- T Wave Inversion
- Troponin T and I
- CK-MB
- Considerations
- Early ECG
- Cardiac Stress Test
2 mins
Cardiac Enzyme Evaluation: Troponin
- Measures
- Cardiac Muscle Injury
- Time Ranges
- Detection in Blood: 4 Hours
- Peak: 24 - 36 Hours
- Return to Normal: 5 - 14 Days
- Considerations
- Most Specific for Cardiac Muscle
- Treat Aggressively
2 mins
Cardiac Enzyme Evaluation: Myoglobin
- Measures
- Skeletal or Cardiac Muscle Injury
- Time Ranges
- Onset: 1 - 4 Hours
- Peak: 12 Hours
- Return to Normal: 24 Hours
- Considerations
- Elevation After 24 Hours: Reinfarction
2 mins
Cardiac Enzyme Evaluation: Creatine Kinase CK-MB
- Measures
- Skeletal or Cardiac Muscle Injury
- Time Ranges
- Onset: 4-8 Hours
- Peak: 12-24 Hours
- Return to Normal: 2-3 Days
1 min
12 Lead Contiguous Leads - Anterior Wall MI
- Leads Elevated
- Lead V3
- Lead V4
- Artery Affected
- Left Anterior Descending (LAD)
56 secs
12 Lead Contiguous Leads - Inferior Wall MI
- Leads Elevated
- Lead II
- Lead III
- Lead aVF
- Artery Affected
- Right Coronary Artery (RCA)
56 secs
12 Lead Contiguous Leads - Lateral Wall MI
- Leads Elevated
- Lead I
- Lead aVL
- Lead V5
- Lead V6
- Artery Affected
- Circumflex
1 min
12 Lead Contiguous Leads - Septal Wall MI
- Elevated Leads
- Lead V1
- Lead V2
- Artery Affected
- Left Anterior Descending (LAD)
48 secs
