A patient presents with severe substernal chest pain
The patient exclaims, "This is the most severe pain I have ever felt!" The patient reports that the pain came on suddenly about 2 hours ago and that three sublingual nitroglycerin tablets have not relieved the pain. The 12-lead ECG reveals only the following abnormalities: T-wave inversion in leads I, aVL, V4, and V5; pathologic Q waves in leads II, III, and aVF; ST segment elevation in leads V1, V2, V3, and V4 . Which of the following is probably accurate about this patient?
a. This patient has an old lateral wall infarction.
b. This patient is having an inferior wall infarction.
c. This patient is having an acute anterior wall infarction.
d. This patient is having a posterior wall infarction.
C
Acute anterior wall infarctions are manifested by electrocardiographic (ECG) changes in leads V2 to V4 . Inferior infarctions are manifested by ECG changes in leads II, III, and aVF. Lateral wall infarctions are manifested by ECG changes in leads V5 to V6, I, and aVL. Posterior wall infarctions are manifested by ECG changes in leads V1 to V2 .
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