A、Chest pain. B、Tight in the chest. C、Dizziness. D、Coronary heart disease. D四个选项在对话中都有所提及。问题问的是根据检查报告，男士真正的问题是什么。根据对话可知，男士的心电图报告

W: I need to find a dentist; you said you know Dr. Smith well, do you recommend her?
M: Well, I had to see her a few times, but what impressed me most were the magazines in her waiting room.
Q: What does the woman imply?

W: Good morning. How are you feeling now? Do you still have pain in your chest?
M: No. There is no more pain, but I feel a little tight in my chest. I also feel dizzy when I stand up.
W: Your electrocardiogram shows that you have coronary heart disease. Your attack was brought on by an insufficient blood supply to the heart.
Q: What is the man’s real problem according to the result?