Inferior wall myocardial infarction - old

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Pathological Q waves and T wave inversion are seen in leads II, III and aVF. These are features of an old inferior wall myocardial infarction. In addition there is sinus bradycardia. Sinus bradycardia is common in the acute phase of inferior wall myocardial infarction. In old myocardial infarction it could be because the person is on beta blockers for secondary prevention. Inferior wall infarction can occur due to right coronary artery occlusion or left circumflex coronary artery occlusion. In the acute phase, ST segment elevation will be more in lead III for right coronary occlusion, while it will be more in lead II for left circumflex coronary atery occlusion.