ECG Leads and Myocardial Infarcts

What is the primary electrocardiographic (ECG) finding that indicates the location of a myocardial infarct?

• P wave inversion

• ST elevation

• Prolonged PR interval

• Narrow QRS complex

Which set of ECG leads is typically associated with a lateral myocardial infarct?

• Leads V1, V2

• Leads II, III, aVF

• Leads I, aVL, V5, V6

• Leads V3, V4

An inferior myocardial infarct is typically identified by ST elevation in which ECG leads?

• Leads V1, V2

• Leads I, aVL, V5, V6

• Leads II, III, aVF

• Leads V3, V4

Which combination of ECG leads indicates an anteroseptal myocardial infarct?

• Leads I, aVL, V5, V6

• Leads V1, V2, V3, V4

• Leads II, III, aVF

• Leads V3, V4, V5, V6

An inferolateral myocardial infarct is characterized by ST elevation in which ECG leads?

• Leads V1, V2, V3, V4

• Leads I, aVL, V5, V6

• Leads II, III, aVF

• Leads I, II, III, aVL, aVF, V5, V6