ECG 1. This 54 years-old man had experienced acute inferoposterolateral myocardial infarction 3 years ago and a stent was
implanted to the Circumflex coronary artery.
The Q waves in leads II, III, and aVF show inferior involvement,
The tall R waves in leads C1 and C2 show posterior involvement,
q waves in leads C5 and C6 show lateral involvement.
Negative T waves in leads I and aVL also support the involvement of lateral wall.

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ECG 2. The ECG above belongs to a 53 years-old man who had experienced acute myocardial infarction 3 days ago.
The culprit artery was a well-developed branch of the dominant Circumflex coronary artery.
Inferior leads show q waves and ST segment elevation: inferior wall involvement.
Leads V2 and V3 show peaked T waves and tall R waves: posterior wall involvement.
Leads V5 and V6 show minimal ST segment elevation and T wave negativity: lateral wall involvement.

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ECG 3. The ECG above belongs to a 70 years-old man who had experienced acute inferoposterolateral myocardial infarction
Two months ago he had undergone coronary artery bypass surgery for 3-vessel (extensive) coronary artery disease.
Note the negative T waves in leads II, III, aVF, V5, V6, and also the tall R and T waves in leads V1 and V2.
Limb leads show low voltage. There is also left axis deviation.

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