This 69-year-old man presents to the cardiac clinic for his yearly assessment. Seven years ago, he suffered from a myocardial infarction that was treated successfully with angioplasty. He has no cardiac complaints, and is able to do moderately heavy exercise without discomfort:

• Sinus rhythm, 80/min
• Previous lateral infarct – note the Q waves in leads I and aVL
• Tall R wave in V2, consider posterior infarct   

At the time of his myocardial infarction seven years ago, coronary angiography revealed occlusion of the right and circumflex coronary arteries.